Fix placement of "SET row_security" command issuance in pg_dump.

Somebody apparently threw darts at the code to decide where to insert
these.  They certainly didn't proceed by adding them where other similar
SETs were handled.  This at least broke pg_restore, and perhaps other
use-cases too.

src/bin/pg_dump/pg_backup_archiver.c

@@ -434,17 +434,6 @@ RestoreArchive(Archive *AHX)
 			ahprintf(AH, "BEGIN;\n\n");
 	}
 
-	/*
-	 * Enable row-security if necessary.
-	 */
-	if (PQserverVersion(AH->connection) >= 90500)
-	{
-		if (!ropt->enable_row_security)
-			ahprintf(AH, "SET row_security = off;\n");
-		else
-			ahprintf(AH, "SET row_security = on;\n");
-	}
-
 	/*
 	 * Establish important parameter values right away.
 	 */
@@ -2804,6 +2793,12 @@ _doSetFixedOutputState(ArchiveHandle *AH)
 	if (!AH->public.std_strings)
 		ahprintf(AH, "SET escape_string_warning = off;\n");
 
+	/* Adjust row-security state */
+	if (AH->ropt && AH->ropt->enable_row_security)
+		ahprintf(AH, "SET row_security = on;\n");
+	else
+		ahprintf(AH, "SET row_security = off;\n");
+
 	ahprintf(AH, "\n");
 }
 

src/bin/pg_dump/pg_dump.c

@@ -1005,6 +1005,17 @@ setup_connection(Archive *AH, DumpOptions *dopt, const char *dumpencoding,
 	if (quote_all_identifiers && AH->remoteVersion >= 90100)
 		ExecuteSqlStatement(AH, "SET quote_all_identifiers = true");
 
+	/*
+	 * Adjust row-security mode, if supported.
+	 */
+	if (AH->remoteVersion >= 90500)
+	{
+		if (dopt->enable_row_security)
+			ExecuteSqlStatement(AH, "SET row_security = on");
+		else
+			ExecuteSqlStatement(AH, "SET row_security = off");
+	}
+
 	/*
 	 * Start transaction-snapshot mode transaction to dump consistent data.
 	 */
@@ -1058,14 +1069,6 @@ setup_connection(Archive *AH, DumpOptions *dopt, const char *dumpencoding,
 			 AH->remoteVersion >= 90200 &&
 			 !dopt->no_synchronized_snapshots)
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-
-	if (AH->remoteVersion >= 90500)
-	{
-		if (dopt->enable_row_security)
-			ExecuteSqlStatement(AH, "SET row_security TO ON");
-		else
-			ExecuteSqlStatement(AH, "SET row_security TO OFF");
-	}
 }
 
 static void