ask-password: once we hit the message argument, don't process switches anymore

Let's not mangle the message part unnecessarily, that'd be confusing and
unexpected.

src/ask-password/ask-password.c

@@ -104,7 +104,7 @@ static int parse_argv(int argc, char *argv[]) {
 
         /* Note the asymmetry: the long option --echo= allows an optional argument, the short option does
          * not. */
-        while ((c = getopt_long(argc, argv, "he", options, NULL)) >= 0)
+        while ((c = getopt_long(argc, argv, "+he", options, NULL)) >= 0)
 
                 switch (c) {