Sort GUCs in alphabetical order

src/backend/distributed/shared_library_init.c

@@ -580,6 +580,17 @@ RegisterCitusConfigVariables(void)
 		GUC_STANDARD,
 		NULL, NULL, NULL);
 
+	DefineCustomBoolVariable(
+		"citus.check_available_space_before_move",
+		gettext_noop("When enabled will check free disk space before a shard move"),
+		gettext_noop(
+			"Free disk space will be checked when this setting is enabled before each shard move."),
+		&CheckAvailableSpaceBeforeMove,
+		true,
+		PGC_USERSET,
+		GUC_NO_SHOW_ALL,
+		NULL, NULL, NULL);
+
 	DefineCustomStringVariable(
 		"citus.cluster_name",
 		gettext_noop("Which cluster this node is a part of"),
@@ -664,6 +675,20 @@ RegisterCitusConfigVariables(void)
 		GUC_UNIT_MS,
 		NULL, NULL, NULL);
 
+	DefineCustomRealVariable(
+		"citus.desired_percent_disk_available_after_move",
+		gettext_noop(
+			"Sets how many percentage of free disk space should be after a shard move"),
+		gettext_noop(
+			"This setting controls how much free space should be available after a shard move."
+			"If the free disk space will be lower than this parameter, then shard move will result in"
+			"an error."),
+		&DesiredPercentFreeAfterMove,
+		10.0, 0.0, 100.0,
+		PGC_SIGHUP,
+		GUC_STANDARD,
+		NULL, NULL, NULL);
+
 	DefineCustomRealVariable(
 		"citus.distributed_deadlock_detection_factor",
 		gettext_noop("Sets the time to wait before checking for distributed "
@@ -955,31 +980,6 @@ RegisterCitusConfigVariables(void)
 		0,
 		NULL, NULL, NULL);
 
-	DefineCustomBoolVariable(
-		"citus.check_available_space_before_move",
-		gettext_noop("When enabled will check free disk space before a shard move"),
-		gettext_noop(
-			"Free disk space will be checked when this setting is enabled before each shard move."),
-		&CheckAvailableSpaceBeforeMove,
-		true,
-		PGC_USERSET,
-		GUC_NO_SHOW_ALL,
-		NULL, NULL, NULL);
-
-	DefineCustomRealVariable(
-		"citus.desired_percent_disk_available_after_move",
-		gettext_noop(
-			"Sets how many percentage of free disk space should be after a shard move"),
-		gettext_noop(
-			"This setting controls how much free space should be available after a shard move."
-			"If the free disk space will be lower than this parameter, then shard move will result in"
-			"an error."),
-		&DesiredPercentFreeAfterMove,
-		10.0, 0.0, 100.0,
-		PGC_SIGHUP,
-		GUC_STANDARD,
-		NULL, NULL, NULL);
-
 	DefineCustomBoolVariable(
 		"citus.enable_cost_based_connection_establishment",
 		gettext_noop("When enabled the connection establishment times "
@@ -1079,6 +1079,19 @@ RegisterCitusConfigVariables(void)
 		GUC_UNIT_BYTE | GUC_NO_SHOW_ALL,
 		NULL, NULL, NULL);
 
+	DefineCustomStringVariable(
+		"citus.local_hostname",
+		gettext_noop("Sets the hostname when connecting back to itself."),
+		gettext_noop("For some operations nodes, mostly the coordinator, connect back to "
+					 "itself. When configuring SSL certificates it sometimes is required "
+					 "to use a specific hostname to match the CN of the certificate when "
+					 "verify-full is used."),
+		&LocalHostName,
+		"localhost",
+		PGC_SUSET,
+		GUC_STANDARD,
+		NULL, NULL, NULL);
+
 	DefineCustomIntVariable(
 		"citus.local_shared_pool_size",
 		gettext_noop(
@@ -1718,19 +1731,6 @@ RegisterCitusConfigVariables(void)
 		GUC_STANDARD,
 		NULL, NULL, NULL);
 
-	DefineCustomStringVariable(
-		"citus.local_hostname",
-		gettext_noop("Sets the hostname when connecting back to itself."),
-		gettext_noop("For some operations nodes, mostly the coordinator, connect back to "
-					 "itself. When configuring SSL certificates it sometimes is required "
-					 "to use a specific hostname to match the CN of the certificate when "
-					 "verify-full is used."),
-		&LocalHostName,
-		"localhost",
-		PGC_SUSET,
-		GUC_STANDARD,
-		NULL, NULL, NULL);
-
 	DefineCustomBoolVariable(
 		"citus.writable_standby_coordinator",
 		gettext_noop("Enables simple DML via a streaming replica of the coordinator"),