Replace remaining uses of "whitelist".

Instead describe the action that the list effects, or just use "list"
where the meaning is obvious from context.

Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://postgr.es/m/20200615182235.x7lch5n6kcjq4aue%40alap3.anarazel.de

contrib/postgres_fdw/postgres_fdw.h

@@ -77,7 +77,7 @@ typedef struct PgFdwRelationInfo
 	bool		use_remote_estimate;
 	Cost		fdw_startup_cost;
 	Cost		fdw_tuple_cost;
-	List	   *shippable_extensions;	/* OIDs of whitelisted extensions */
+	List	   *shippable_extensions;	/* OIDs of shippable extensions */
 
 	/* Cached catalog information. */
 	ForeignTable *table;

contrib/postgres_fdw/shippable.c

@@ -7,7 +7,7 @@
  * data types are shippable to a remote server for execution --- that is,
  * do they exist and have the same behavior remotely as they do locally?
  * Built-in objects are generally considered shippable.  Other objects can
- * be shipped if they are white-listed by the user.
+ * be shipped if they are declared as such by the user.
  *
  * Note: there are additional filter rules that prevent shipping mutable
  * functions or functions using nonportable collations.  Those considerations
@@ -110,7 +110,7 @@ InitializeShippableCache(void)
  *
  * Right now "shippability" is exclusively a function of whether the object
  * belongs to an extension declared by the user.  In the future we could
- * additionally have a whitelist of functions/operators declared one at a time.
+ * additionally have a list of functions/operators declared one at a time.
  */
 static bool
 lookup_shippable(Oid objectId, Oid classId, PgFdwRelationInfo *fpinfo)

src/backend/access/hash/hashvalidate.c

@@ -312,7 +312,7 @@ check_hash_func_signature(Oid funcid, int16 amprocnum, Oid argtype)
 		 * that are different from but physically compatible with the opclass
 		 * datatype.  In some of these cases, even a "binary coercible" check
 		 * fails because there's no relevant cast.  For the moment, fix it by
-		 * having a whitelist of allowed cases.  Test the specific function
+		 * having a list of allowed cases.  Test the specific function
 		 * identity, not just its input type, because hashvarlena() takes
 		 * INTERNAL and allowing any such function seems too scary.
 		 */

src/backend/utils/adt/lockfuncs.c

@@ -644,7 +644,7 @@ pg_isolation_test_session_is_blocked(PG_FUNCTION_ARGS)
 	/*
 	 * Check if blocked_pid is waiting for a safe snapshot.  We could in
 	 * theory check the resulting array of blocker PIDs against the
-	 * interesting PIDs whitelist, but since there is no danger of autovacuum
+	 * interesting PIDs list, but since there is no danger of autovacuum
 	 * blocking GetSafeSnapshot there seems to be no point in expending cycles
 	 * on allocating a buffer and searching for overlap; so it's presently
 	 * sufficient for the isolation tester's purposes to use a single element

src/tools/pginclude/README

@@ -64,7 +64,7 @@ with no prerequisite headers other than postgres.h (or postgres_fe.h
 or c.h, as appropriate).
 
 A small number of header files are exempted from this requirement,
-and are whitelisted in the headerscheck script.
+and are skipped by the headerscheck script.
 
 The easy way to run the script is to say "make -s headerscheck" in
 the top-level build directory after completing a build.  You should
@@ -86,7 +86,7 @@ the project's coding language is C, some people write extensions in C++,
 so it's helpful for include files to be C++-clean.
 
 A small number of header files are exempted from this requirement,
-and are whitelisted in the cpluspluscheck script.
+and are skipped by the cpluspluscheck script.
 
 The easy way to run the script is to say "make -s cpluspluscheck" in
 the top-level build directory after completing a build.  You should