SCD: Add option enable-keypad-varlen and support for GEMPC_PINPAD.

* scd/scdaemon.h (opt): Add enable_keypad_varlen.
* scd/scdaemon.c (cmd_and_opt_values): Add oEnableKeypadVarlen.
(opts, main): Add oEnableKeypadVarlen.
* scd/ccid-driver.c (GEMPC_PINPAD): New.
(ccid_transceive_secure): Add enable_varlen handling.
Enable GEMPC_PINPAD.
--
Note that GEMPC_PINPAD doesn't support variable length keypad input.
The feature of fixed length keypad input will be added soon.

scd/scdaemon.c

@@ -95,6 +95,7 @@ enum cmd_and_opt_values
   oAllowAdmin,
   oDenyAdmin,
   oDisableApplication,
+  oEnableKeypadVarlen,
   oDebugDisableTicker
 };
 
@@ -148,6 +149,8 @@ static ARGPARSE_OPTS opts[] = {
   ARGPARSE_s_n (oDenyAdmin, "deny-admin",
                 N_("deny the use of admin card commands")),
   ARGPARSE_s_s (oDisableApplication, "disable-application", "@"),
+  ARGPARSE_s_n (oEnableKeypadVarlen, "enable-keypad-varlen",
+                N_("use variable length input for keypad")),
 
   ARGPARSE_end ()
 };
@@ -587,6 +590,8 @@ main (int argc, char **argv )
           add_to_strlist (&opt.disabled_applications, pargs.r.ret_str);
           break;
 
+	case oEnableKeypadVarlen: opt.enable_keypad_varlen = 1; break;
+
         default:
           pargs.err = configfp? ARGPARSE_PRINT_WARNING:ARGPARSE_PRINT_ERROR;
           break;