ic-proxy: make gp_interconnect_proxy_addresses a GUC

(cherry picked from commit 3140a44f)

src/backend/utils/misc/guc_gp.c

@@ -4595,6 +4595,19 @@ struct config_string ConfigureNamesString_gp[] =
 		NULL, NULL, NULL
 	},
 
+#ifdef HAVE_LIBUV
+	{
+		{"gp_interconnect_proxy_addresses", PGC_POSTMASTER, DEVELOPER_OPTIONS,
+			gettext_noop("Sets the ic-proxy addresses as \"content:ip:port ...\", must be ordered by content, the port is ignored at the moment."),
+			gettext_noop("e.g. \"-1:10.0.0.1:2000 0:10.0.0.2:2000 1:10.0.0.2:2001\""),
+			GUC_NO_SHOW_ALL | GUC_GPDB_NO_SYNC
+		},
+		&gp_interconnect_proxy_addresses,
+		"",
+		NULL, NULL, NULL
+	},
+#endif  /* HAVE_LIBUV */
+
 	/* End-of-list marker */
 	{
 		{NULL, 0, 0, NULL, NULL}, NULL, NULL, NULL, NULL

src/include/utils/sync_guc_name.h

@@ -35,6 +35,7 @@
 		"gp_interconnect_log_stats",
 		"gp_interconnect_min_retries_before_timeout",
 		"gp_interconnect_min_rto",
+		"gp_interconnect_proxy_addresses",
 		"gp_interconnect_queue_depth",
 		"gp_interconnect_setup_timeout",
 		"gp_interconnect_snd_queue_depth",