improved help

bin/hsadmin-ng

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [ "$#" -eq 0 ]; then
+if [ "$#" -eq 0 ] || [ "$1" == "help" ] || [ "$1" == "--help" ] || [ "$1" == "-h" ]; then
   cat <<EOF
   curl-wrapper utilizing CAS-authentification for hsadmin-ng"
   usage: $0 [--trace] <<command>> [parameters]
@@ -137,7 +137,7 @@ case "$1" in
   *)
     cat >&2 <<EOF
     unknown command: '$1'
-    valid commands: login, validate, curl
+    valid commands: help, login, logout, validate, get, post, patch, delete
 EOF
     exit 1
     ;;