[docs] [ysql] update docs and CLIs for dump masters addresses (yugabyte#7744)

Author: nvcnvn

docs/content/latest/admin/ysql-dump.md

@@ -71,6 +71,9 @@ Create the dump in the specified character set encoding. By default, the dump is
 
 Send output to the specified file. This parameter can be omitted for file-based output formats, in which case the standard output is used.
 
+#### -m *addresses*, --masters=*addresses*
+Comma-separated list of YB-Master hosts and ports.
+
 #### -n *schema*, --schema=*schema*
 
 Dump only schemas matching *schema*; this selects both the schema itself, and all its contained objects. When this option is not specified, all non-system schemas in the target database will be dumped. Multiple schemas can be selected by writing multiple `-n|--schema` options. Also, the *schema* parameter is interpreted as a pattern according to the same rules used by the `ysqlsh \d` commands, so multiple schemas can also be selected by writing wildcard characters in the pattern. When using wildcards, be careful to quote the pattern if needed to prevent the shell from expanding the wildcards.

docs/content/latest/manage/backup-restore/snapshot-ysql.md

@@ -75,7 +75,7 @@ YugabyteDB supports distributed backup and restore of YSQL databases. Backing up
 1. Create a backup of the YSQL metadata, including the schema, by running the following `ysql_dump --create` command:
 
     ```sh
-    ysql_dump -h <ip> --include-yb-metadata --serializable-deferrable --create --schema-only --dbname <database_name> --file ysql.schema.sql
+    ysql_dump -h <ip> --masters <ip1:7100,ip2:7100,ip3:7100> --include-yb-metadata --serializable-deferrable --create --schema-only --dbname <database_name> --file ysql.schema.sql
     ```
 
 1. Get the current YSQL schema catalog version by running the [`yb-admin ysql_catalog_version`](../../../admin/yb-admin/#ysql-catalog-version) command:

src/postgres/src/bin/pg_dump/pg_dump.c

@@ -1066,7 +1066,7 @@ help(const char *progname)
 	printf(_("  -w, --no-password        never prompt for password\n"));
 	printf(_("  -W, --password           force password prompt (should happen automatically)\n"));
 	printf(_("  --role=ROLENAME          do SET ROLE before dump\n"));
-	printf(_("  -m, --masters=IPS        YugaByte Master hosts IP addresses\n"));
+	printf(_("  -m, --masters=HOST:PORT  comma-separated list of YB-Master hosts and ports\n"));
 
 	printf(_("\nIf no database name is supplied, then the PGDATABASE environment\n"
 			 "variable value is used.\n\n"));

src/postgres/src/bin/pg_dump/pg_dumpall.c

@@ -633,7 +633,7 @@ help(void)
 	printf(_("  --use-set-session-authorization\n"
 			 "                               use SET SESSION AUTHORIZATION commands instead of\n"
 			 "                               ALTER OWNER commands to set ownership\n"));
-	printf(_("  -m, --masters=IPS            YugaByte Master hosts IP addresses\n"));
+	printf(_("  -m, --masters=HOST:PORT      comma-separated list of YB-Master hosts and ports\n"));
 
 	printf(_("\nConnection options:\n"));
 	printf(_("  -d, --dbname=CONNSTR     connect using connection string\n"));