wks: Allow command style args for gpg-wks-client.

* tools/gpg-wks-client.c (wrong_args): Take two args.  Change all
callers.
(main): Pass ARGPARSE_FLAG_COMMAND for recent gpgrt version.
--

This requires gpgrt 1.48.  Of course "gpg-wks-client --create ..."
continues to work.

doc/wks.texi

@@ -136,6 +136,8 @@ The command @option{--print-wkd-url} prints the URLs used to fetch the
 key for the given user-ids from WKD.  The meanwhile preferred format
 with sub-domains is used here.
 
+All commands may also be given without the two leading dashes.
+
 @mansect options
 @noindent
 @command{gpg-wks-client} understands these options:

tools/gpg-wks-client.c

@@ -154,7 +154,7 @@ static char **blacklist_array;
 static size_t blacklist_array_len;
 
 
-static void wrong_args (const char *text) GPGRT_ATTR_NORETURN;
+static void wrong_args (const char *t1, const char *t2) GPGRT_ATTR_NORETURN;
 static void add_blacklist (const char *fname);
 static gpg_error_t proc_userid_from_stdin (gpg_error_t (*func)(const char *),
                                            const char *text);
@@ -204,10 +204,15 @@ my_strusage( int level )
 
 
 static void
-wrong_args (const char *text)
+wrong_args (const char *text, const char *text2)
 {
-  es_fprintf (es_stderr, _("usage: %s [options] %s\n"),
+#if GPGRT_VERSION_NUMBER >= 0x013000 /* >= 1.48 */
-              gpgrt_strusage (11), text);
+  /* Skip the leading dashes if build with command support.  */
+  if (text[0] == '-' && text[1] == '-' && text[2])
+    text += 2;
+#endif
+  es_fprintf (es_stderr, _("usage: %s %s [options] %s\n"),
+              gpgrt_strusage (11), text, text2);
   exit (2);
 }
 
@@ -315,6 +320,9 @@ main (int argc, char **argv)
   pargs.argc  = &argc;
   pargs.argv  = &argv;
   pargs.flags = ARGPARSE_FLAG_KEEP;
+#if GPGRT_VERSION_NUMBER >= 0x013000 /* >= 1.48 */
+  pargs.flags |= ARGPARSE_FLAG_COMMAND;
+#endif
   cmd = parse_arguments (&pargs, opts);
   gpgrt_argparse (NULL, &pargs, NULL);
 
@@ -394,7 +402,7 @@ main (int argc, char **argv)
       else
         {
           if (argc != 1)
-            wrong_args ("--supported DOMAIN");
+            wrong_args ("--supported", "DOMAIN");
           err = command_supported (argv[0]);
           if (err && gpg_err_code (err) != GPG_ERR_FALSE)
             log_error ("checking support failed: %s\n", gpg_strerror (err));
@@ -403,7 +411,7 @@ main (int argc, char **argv)
 
     case aCreate:
       if (argc != 2)
-        wrong_args ("--create FINGERPRINT USER-ID");
+        wrong_args ("--create", "FINGERPRINT USER-ID");
       err = command_create (argv[0], argv[1]);
       if (err)
         log_error ("creating request failed: %s\n", gpg_strerror (err));
@@ -411,7 +419,7 @@ main (int argc, char **argv)
 
     case aReceive:
       if (argc)
-        wrong_args ("--receive < MIME-DATA");
+        wrong_args ("--receive", "< MIME-DATA");
       err = wks_receive (es_stdin, command_receive_cb, NULL);
       if (err)
         log_error ("processing mail failed: %s\n", gpg_strerror (err));
@@ -419,7 +427,7 @@ main (int argc, char **argv)
 
     case aRead:
       if (argc)
-        wrong_args ("--read < WKS-DATA");
+        wrong_args ("--read", "< WKS-DATA");
       err = read_confirmation_request (es_stdin);
       if (err)
         log_error ("processing mail failed: %s\n", gpg_strerror (err));
@@ -427,7 +435,7 @@ main (int argc, char **argv)
 
     case aCheck:
       if (argc != 1)
-        wrong_args ("--check USER-ID");
+        wrong_args ("--check", "USER-ID");
       err = command_check (argv[0]);
       break;
 
@@ -444,12 +452,12 @@ main (int argc, char **argv)
       else if (argc == 2)
         err = wks_cmd_install_key (*argv, argv[1]);
       else
-        wrong_args ("--install-key [FILE|FINGERPRINT USER-ID]");
+        wrong_args ("--install-key", "[FILE|FINGERPRINT USER-ID]");
       break;
 
     case aRemoveKey:
       if (argc != 1)
-        wrong_args ("--remove-key USER-ID");
+        wrong_args ("--remove-key", "USER-ID");
       err = wks_cmd_remove_key (*argv);
       break;