Do not check argc for SHOW_CONFIG and SET_CONFIG

Author: Arthur Zakirov

src/configure.c

@@ -198,7 +198,7 @@ readBackupCatalogConfigFile(void)
 		{ 'f', 36, "compress-algorithm",	opt_compress_alg,				SOURCE_CMDLINE },
 		{ 'u', 37, "compress-level",		&(config->compress_level),		SOURCE_CMDLINE },
 		/* logging options */
-		{ 'i', 0, "log",					&(config->log_to_file),			SOURCE_CMDLINE },
+		{ 'b', 0, "log",					&(config->log_to_file),			SOURCE_CMDLINE },
 		{ 'f', 0, "log-level",				opt_log_level,					SOURCE_CMDLINE },
 		{ 's', 0, "log-filename",			&(config->log_filename),		SOURCE_CMDLINE },
 		{ 's', 0, "error-log-filename",		&(config->error_log_filename),	SOURCE_CMDLINE },

src/pg_probackup.c

@@ -403,12 +403,8 @@ main(int argc, char *argv[])
 			else
 				return do_delete(current.backup_id);
 		case SHOW_CONFIG:
-			if (argc > 6)
-				elog(ERROR, "show-config command doesn't accept any options except -B and --instance");
 			return do_configure(true);
 		case SET_CONFIG:
-			if (argc == 6)
-				elog(ERROR, "set-config command requires at least one option");
 			return do_configure(false);
 	}