Add catch-all for bad verbs

sshdpw

@@ -16,6 +16,14 @@ case "${1}" in
       FROM=no; TO=yes;
     fi
     ;;
+  *)
+    echo 'Must specify one of the following:'
+    echo '  [ on | yes | enable | unlock ] to allow interactive passwords'
+    echo '  [ off | no | disable | lock ] to disallow interactive passwords'
+    echo '  [ toggle ] to toggle the allowance of interactive passwords'
+    echo '  [ status ] to show the current state of interactive passwords'
+    exit 1
+  ;;
 esac
 
 for OPTION in PasswordAuthentication ChallengeResponseAuthentication; do