common: New common option no-autostart.

* common/comopt.c (opts): Add "no-autostart".
(parse_comopt): Set it.
* common/comopt.h (comopt): Add no_autostart.

* g10/gpg.c (main): Take care of the new option.
* sm/gpgsm.c (main): Ditto.
* tools/gpg-connect-agent.c (INCLUDED_BY_MAIN_MODULE): Add.
(main): Parse common options and handle new option.
* tools/gpg-card.c (main): Ditto.
(cmd_yubikey): Fix minor error reporting issue.

* common/util.h (GNUPG_MODULE_NAME_CARD): New const.
* common/homedir.c (gnupg_module_name): Support it.
--

Having a global option makes it easier to use disable autostart on a
server which is required to use a remote gpg-agent reliable.

common/comopt.c

@@ -45,6 +45,7 @@ enum opt_values
     oLogFile = 500,
     oUseKeyboxd,
     oKeyboxdProgram,
+    oNoAutostart,
 
     oNoop
   };
@@ -52,6 +53,7 @@ enum opt_values
 static gpgrt_opt_t opts[] = {
   ARGPARSE_s_s (oLogFile,        "log-file", "@"),
   ARGPARSE_s_n (oUseKeyboxd,     "use-keyboxd", "@"),
+  ARGPARSE_s_n (oNoAutostart,    "no-autostart", "@"),
   ARGPARSE_s_s (oKeyboxdProgram, "keyboxd-program", "@"),
 
   ARGPARSE_end ()
@@ -60,7 +62,7 @@ static gpgrt_opt_t opts[] = {
 
 
 /* Parse the common options in the homedir and etc.  This needs to be
- * called after the gpgrt config directories are.  MODULE_ID is one of
+ * called after the gpgrt config directories are set.  MODULE_ID is one of
  * the GNUPG_MODULE_NAME_ constants.  If verbose is true info about
  * the parsing is printed.  Note that this function is not
  * thread-safe. */
@@ -102,6 +104,10 @@ parse_comopt (int module_id, int verbose)
           comopt.use_keyboxd = 1;
           break;
 
+        case oNoAutostart:
+          comopt.no_autostart = 1;
+          break;
+
         case oKeyboxdProgram:
           comopt.keyboxd_program = pargs.r.ret_str;
           break;