(mh_getopt): Implemented -version option.

@@ -53,6 +53,10 @@ mh_getopt (int argc, char **argv, struct mh_option *mh_opt, const char *doc)
       return 0;
     }
 
+  if (strcmp (mh_optptr, "-version") == 0)
+    asprintf (&argv[mh_optind], "--version");
+  else
+    {
       optlen = strlen (mh_optptr+1);
       for (p = mh_opt; p->opt; p++)
 	{
@@ -98,6 +102,7 @@ mh_getopt (int argc, char **argv, struct mh_option *mh_opt, const char *doc)
 	}
       else
 	mh_optind++;
+    }
   return '?';
 }
 
@@ -137,6 +142,7 @@ mh_help (struct mh_option *mh_opt, const char *doc)
       printf ("\n");
     }
   printf ("  -help\n");
+  printf ("  -version\n");
   printf (_("\nPlease use GNU long options instead.\n"
             "Run %s --help for more info on these.\n"),
             program_invocation_short_name);