riot: support multiple remotes, delimiter=comma (,)

scripts/riot

@@ -91,8 +91,9 @@ get_server_meta() {
     esac
 }
 
+parse_remote() {
     # remote setting, including jump servers
-# will be called only once
+    # called for every remote
     # provides:
     SERVER=""
     TRUST_SERVER=1
@@ -102,7 +103,7 @@ SSH_OPTIONS=""  # optional
     if [[ "$RIOT_TRUST_CLIENT" == "1" ]]; then
         SSH_OPTIONS='-o ControlMaster=auto -o ControlPath=/tmp/sshcm-%C -o PermitLocalCommand=yes'
     fi
-parse_remote() {
+    # handle input
     local remote="$1"
     local jump_servers=""
     # loop for jump servers
@@ -212,12 +213,14 @@ router() {
         print_help
         exit
     fi
-    parse_remote "$1"
+
+    IFS=',' read -ra remotes <<< "$1"
+    for remote in "${remotes[@]}"; do
+        if [[ -z "$remote" ]]; then
+            continue
+        fi
+        parse_remote "$remote"
         case $2 in
-        -h|--help)
-            print_help
-            exit
-            ;;
             ssh|"" )
                 run_ssh ssh "${@:3}"
                 ;;
@@ -241,6 +244,7 @@ router() {
                 fmt_fatal "unknown command: $2"
                 ;;
         esac
+    done
 }
 
 router "${GOT_OPTS[@]}"