pg_restore: Fix wrong descriptions of --with-{schema,data,statistics} options.

Commit bde2fb797a added the --with-schema, --with-data, and --with-statistics
options to pg_restore. These options control whether to restore schema, data,
or statistics if present in the archive. However, the help message and
documentation incorrectly described them as affecting what gets dumped.

This commit corrects those descriptions to clarify that the options control
restoration, not dumping.

Bug: #18952
Reported-by: TAKATSUKA Haruka <harukat@sraoss.co.jp>
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: TAKATSUKA Haruka <harukat@sraoss.co.jp>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/18952-be40a620f8b1e755@postgresql.org

doc/src/sgml/ref/pg_restore.sgml

@@ -923,7 +923,8 @@ PostgreSQL documentation
       <term><option>--with-data</option></term>
       <listitem>
        <para>
-        Dump data. This is the default.
+        Output commands to restore data, if the archive contains them.
+        This is the default.
        </para>
       </listitem>
      </varlistentry>
@@ -932,7 +933,8 @@ PostgreSQL documentation
       <term><option>--with-schema</option></term>
       <listitem>
        <para>
-        Dump schema (data definitions). This is the default.
+        Output commands to restore schema (data definitions), if the archive
+        contains them. This is the default.
        </para>
       </listitem>
      </varlistentry>
@@ -941,7 +943,8 @@ PostgreSQL documentation
       <term><option>--with-statistics</option></term>
       <listitem>
        <para>
-        Dump statistics. This is the default.
+        Output commands to restore statistics, if the archive contains them.
+        This is the default.
        </para>
       </listitem>
      </varlistentry>

src/bin/pg_dump/pg_restore.c

@@ -712,9 +712,9 @@ usage(const char *progname)
 	printf(_("  --use-set-session-authorization\n"
 			 "                               use SET SESSION AUTHORIZATION commands instead of\n"
 			 "                               ALTER OWNER commands to set ownership\n"));
-	printf(_("  --with-data                  dump the data\n"));
-	printf(_("  --with-schema                dump the schema\n"));
-	printf(_("  --with-statistics            dump the statistics\n"));
+	printf(_("  --with-data                  restore the data\n"));
+	printf(_("  --with-schema                restore the schema\n"));
+	printf(_("  --with-statistics            restore the statistics\n"));
 
 	printf(_("\nConnection options:\n"));
 	printf(_("  -h, --host=HOSTNAME      database server host or socket directory\n"));