Accept comma separation for the -a subargs for consistency with -s and -h

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2981 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_param.c

@@ -323,7 +323,7 @@ tweak_listen_address(struct cli *cli, const struct parspec *par, const char *arg
 		return;
 	}
 
-	av = ParseArgv(arg, 0);
+	av = ParseArgv(arg, ARGV_COMMA);
 	if (av == NULL) {
 		cli_out(cli, "Parse error: out of memory");
 		cli_result(cli, CLIS_PARAM);