catch errors when calling bfaconfig with wrong parameters

bin/libbfa.sh

@@ -62,7 +62,7 @@ function    geth_exec
 
 function    geth_rpc
 {
-    bfaconfig nodedir
+    bfaconfig node
     local   cmd=$1
     test    -n "$cmd"
     local   params=
@@ -240,6 +240,9 @@ function    bfaconfig
         account|max)
             account
             ;;
+        *)
+            fatal "Unknown bfaconfig request"
+            ;;
     esac
 }