scd: Remove unsupported --card-timeout option.

* doc/scdaemon.texi (card-timeout): Remove.
* scd/scdaemon.c (main): Remove oCardTimeout handling.

--

There was the card-timeout option in GnuPG 2.0, but it was never
implemented correctly.  The intention of this option was to allow
sharing smartcard among multiple applications, but this didn't work
well as user's expectation (it only worked with DISCONNECT command).
This is because other parts of scdaemon assumes exclusive access.  In
GnuPG 2.1, the support of the option was removed, improving
"DISCONNECT" command always works well without this option.

GnuPG-bug-id: 3383
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

doc/scdaemon.texi

@@ -286,20 +286,6 @@ To get a list of available CCID readers you may use this command:
 @end smallexample
 @end cartouche
 
-@item --card-timeout @var{n}
-@opindex card-timeout
-If @var{n} is not 0 and no client is actively using the card, the card
-will be powered down after @var{n} seconds.  Powering down the card
-avoids a potential risk of damaging a card when used with certain
-cheap readers.  This also allows applications that are not aware of
-Scdaemon to access the card.  The disadvantage of using a card timeout
-is that accessing the card takes longer and that the user needs to
-enter the PIN again after the next power up.
-
-Note that with the current version of Scdaemon the card is powered
-down immediately at the next timer tick for any value of @var{n} other
-than 0.
-
 @item --enable-pinpad-varlen
 @opindex enable-pinpad-varlen
 Please specify this option when the card reader supports variable

scd/scdaemon.c

@@ -89,7 +89,6 @@ enum cmd_and_opt_values
   oDaemon,
   oBatch,
   oReaderPort,
-  oCardTimeout,
   octapiDriver,
   opcscDriver,
   oDisableCCID,
@@ -144,8 +143,6 @@ static ARGPARSE_OPTS opts[] = {
                                     "@"
 #endif
                 /* end --disable-ccid */),
-  ARGPARSE_s_u (oCardTimeout, "card-timeout",
-                N_("|N|disconnect the card after N seconds of inactivity")),
 
   ARGPARSE_s_n (oDisablePinpad, "disable-pinpad",
                 N_("do not use a reader's pinpad")),
@@ -614,8 +611,6 @@ main (int argc, char **argv )
           break;
         case oDenyAdmin: opt.allow_admin = 0; break;
 
-        case oCardTimeout: opt.card_timeout = pargs.r.ret_ulong; break;
-
         case oDisableApplication:
           add_to_strlist (&opt.disabled_applications, pargs.r.ret_str);
           break;