Doc: fix some description of environment variables with frontend tools

This addresses a couple of issues in the documentation:
- Description of PG_COLOR was missing for some tools (pg_archivecleanup
and pg_test_fsync), while the other descriptions had grammar mistakes.
- pgbench supports more environment variables: PGUSER, PGHOST and
PGPORT.
- vacuumlo, oid2name and pgbench support coloring (HEAD only)

Author: Michael Paquier
Reviewed-by: Fabien Coelho, Daniel Gustafsson, Juan José Santamaría
Flecha
Discussion: https://postgr.es/m/20200304075418.GJ2593@paquier.xyz
Backpatch-through: 12

doc/src/sgml/oid2name.sgml

@@ -223,6 +223,13 @@
    utilities, also uses the environment variables supported by
    <application>libpq</application> (see <xref linkend="libpq-envars"/>).
   </para>
+
+  <para>
+   The environment variable <envar>PG_COLOR</envar> specifies whether to use
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
+   <literal>never</literal>.
+  </para>
  </refsect1>
 
  <refsect1>

doc/src/sgml/ref/clusterdb.sgml

@@ -279,8 +279,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/createdb.sgml

@@ -327,8 +327,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/createuser.sgml

@@ -405,8 +405,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/dropdb.sgml

@@ -245,8 +245,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/dropuser.sgml

@@ -225,8 +225,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/initdb.sgml

@@ -466,8 +466,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_basebackup.sgml

@@ -706,8 +706,8 @@ PostgreSQL documentation
 
   <para>
    The environment variable <envar>PG_COLOR</envar> specifies whether to use
-   color in diagnostics messages.  Possible values are
-   <literal>always</literal>, <literal>auto</literal>,
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
    <literal>never</literal>.
   </para>
  </refsect1>

doc/src/sgml/ref/pg_checksums.sgml

@@ -191,8 +191,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_controldata.sgml

@@ -73,8 +73,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_dump.sgml

@@ -1229,8 +1229,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_dumpall.sgml

@@ -701,8 +701,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_isready.sgml

@@ -167,8 +167,8 @@ PostgreSQL documentation
 
   <para>
    The environment variable <envar>PG_COLOR</envar> specifies whether to use
-   color in diagnostics messages.  Possible values are
-   <literal>always</literal>, <literal>auto</literal>,
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
    <literal>never</literal>.
   </para>
  </refsect1>

doc/src/sgml/ref/pg_receivewal.sgml

@@ -420,8 +420,8 @@ PostgreSQL documentation
 
   <para>
    The environment variable <envar>PG_COLOR</envar> specifies whether to use
-   color in diagnostics messages.  Possible values are
-   <literal>always</literal>, <literal>auto</literal>,
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
    <literal>never</literal>.
   </para>
  </refsect1>

doc/src/sgml/ref/pg_recvlogical.sgml

@@ -400,8 +400,8 @@ PostgreSQL documentation
 
   <para>
    The environment variable <envar>PG_COLOR</envar> specifies whether to use
-   color in diagnostics messages.  Possible values are
-   <literal>always</literal>, <literal>auto</literal>,
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
    <literal>never</literal>.
   </para>
  </refsect1>

doc/src/sgml/ref/pg_resetwal.sgml

@@ -328,8 +328,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_restore.sgml

@@ -827,8 +827,8 @@
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pg_rewind.sgml

@@ -269,8 +269,8 @@ PostgreSQL documentation
 
   <para>
    The environment variable <envar>PG_COLOR</envar> specifies whether to use
-   color in diagnostics messages.  Possible values are
-   <literal>always</literal>, <literal>auto</literal>,
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
    <literal>never</literal>.
   </para>
  </refsect1>

doc/src/sgml/ref/pg_waldump.sgml

@@ -223,8 +223,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/pgarchivecleanup.sgml

@@ -147,6 +147,18 @@ pg_archivecleanup:  removing file "archive/00000001000000370000000E"
    </para>
  </refsect1>
 
+ <refsect1>
+  <title>Environment</title>
+
+  <para>
+   The environment variable <envar>PG_COLOR</envar> specifies whether to use
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
+   <literal>never</literal>.
+  </para>
+ </refsect1>
+ 
+ 
  <refsect1>
   <title>Notes</title>
 

doc/src/sgml/ref/pgbench.sgml

@@ -883,6 +883,37 @@ pgbench <optional> <replaceable>options</replaceable> </optional> <replaceable>d
   </para>
  </refsect1>
 
+ <refsect1>
+  <title>Environment</title>
+
+  <variablelist>
+   <varlistentry>
+    <term><envar>PGHOST</envar></term>
+    <term><envar>PGPORT</envar></term>
+    <term><envar>PGUSER</envar></term>
+
+    <listitem>
+     <para>
+      Default connection parameters.
+     </para>
+    </listitem>
+   </varlistentry>
+  </variablelist> 
+
+  <para>
+   This utility, like most other <productname>PostgreSQL</productname> utilities,
+   uses the environment variables supported by <application>libpq</application>
+   (see <xref linkend="libpq-envars"/>).
+  </para>
+  
+  <para>
+   The environment variable <envar>PG_COLOR</envar> specifies whether to use
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
+   <literal>never</literal>.
+  </para>
+ </refsect1>
+ 
  <refsect1>
   <title>Notes</title>
 

doc/src/sgml/ref/pgtestfsync.sgml

@@ -103,6 +103,17 @@
 
  </refsect1>
 
+ <refsect1>
+  <title>Environment</title>
+
+  <para>
+   The environment variable <envar>PG_COLOR</envar> specifies whether to use
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
+   <literal>never</literal>.
+  </para>
+ </refsect1>
+ 
  <refsect1>
   <title>See Also</title>
 

doc/src/sgml/ref/psql-ref.sgml

@@ -4501,8 +4501,8 @@ $endif
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/reindexdb.sgml

@@ -380,8 +380,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/ref/vacuumdb.sgml

@@ -474,8 +474,8 @@ PostgreSQL documentation
     <term><envar>PG_COLOR</envar></term>
     <listitem>
      <para>
-      Specifies whether to use color in diagnostics messages.  Possible values
-      are <literal>always</literal>, <literal>auto</literal>,
+      Specifies whether to use color in diagnostic messages. Possible values
+      are <literal>always</literal>, <literal>auto</literal> and
       <literal>never</literal>.
      </para>
     </listitem>

doc/src/sgml/vacuumlo.sgml

@@ -196,6 +196,13 @@
    also uses the environment variables supported by <application>libpq</application>
    (see <xref linkend="libpq-envars"/>).
   </para>
+
+  <para>
+   The environment variable <envar>PG_COLOR</envar> specifies whether to use
+   color in diagnostic messages. Possible values are
+   <literal>always</literal>, <literal>auto</literal> and
+   <literal>never</literal>.
+  </para>
  </refsect1>
 
  <refsect1>