Fix some typos

Author: Guillaume Lelarge
Discussion: https://postgr.es/m/CAECtzeWPz4JikzUqZdMjqPTe8dAP3nZxPD-58Y-Hhvirg0fF+A@mail.gmail.com

doc/src/sgml/file-fdw.sgml

@@ -174,7 +174,7 @@
  </variablelist>
 
  <para>
-  <command>COPY</command>'s <literal>FORCE_QUOTE</literal> options is
+  <command>COPY</command>'s <literal>FORCE_QUOTE</literal> option is
   currently not supported by <literal>file_fdw</literal>.
  </para>
 

doc/src/sgml/runtime.sgml

@@ -753,7 +753,7 @@ psql: could not connect to server: No such file or directory
        <row>
         <entry><varname>SEMMNI</varname></entry>
         <entry>Maximum number of semaphore identifiers (i.e., sets)</entry>
-        <entry>at least <literal>ceil((max_connections + autovacuum_max_workers + wax_wal_senders + max_worker_processes + 5) / 16)</literal> plus room for other applications</entry>
+        <entry>at least <literal>ceil((max_connections + autovacuum_max_workers + max_wal_senders + max_worker_processes + 5) / 16)</literal> plus room for other applications</entry>
        </row>
 
        <row>