pg_resetxlog: Capitalize placeholder in --help output

src/bin/pg_resetxlog/pg_resetxlog.c

@@ -1032,7 +1032,7 @@ usage(void)
 	printf(_("Options:\n"));
 	printf(_("  -e XIDEPOCH      set next transaction ID epoch\n"));
 	printf(_("  -f               force update to be done\n"));
-	printf(_("  -l xlogfile      force minimum WAL starting location for new transaction log\n"));
+	printf(_("  -l XLOGFILE      force minimum WAL starting location for new transaction log\n"));
 	printf(_("  -m XID,OLDEST    set next multitransaction ID and oldest value\n"));
 	printf(_("  -n               no update, just show extracted control values (for testing)\n"));
 	printf(_("  -o OID           set next OID\n"));