[PATCH] g10: Support multiple cards

[NIIBE Yutaka]

Hello,

Attached is a patch to improve --card-status when there are multiple
cards (with internal CCID driver).

The change is a bit larger than I expected, because we need to change
how "LEARN" command works.  Yet, I don't know the impact for other
cases (like Scute and Poldi).  So, I won't push this change soon, but
try more testing.

Here is an example output.

==========================
$ ./g10/gpg --card-status --verbose
gpg: NOTE: THIS IS A DEVELOPMENT VERSION!
gpg: It is only intended for test purposes and should NOT be
gpg: used in a production environment or with production keys!


Reader ...........: 234B:0000:FSIJ-1.2.2-87022128:0
Application ID ...: D276000124010200F517000000010000
Version ..........: 2.0
Manufacturer .....: FSIJ
Serial number ....: 00000001
Name of cardholder: [not set]
Language prefs ...: [not set]
Sex ..............: unspecified
URL of public key : [not set]
Login data .......: [not set]
Signature PIN ....: not forced
Key attributes ...: rsa2048 rsa2048 rsa2048
Max. PIN lengths .: 127 127 127
PIN retry counter : 3 3 3
Signature counter : 46
Signature key ....: 1241 24BD 3B48 62AF 7A0A  42F1 00B4 5EBD 4CA7 BABE
      created ....: 2010-10-15 06:46:33
Encryption key....: 42E1 E805 4E6F 1F30 26F2  DC79 79A7 9093 0842 39CF
      created ....: 2010-10-15 06:46:33
Authentication key: B4D9 7142 C42D 6802 F5F7  4E70 9C33 B6BA 5BB0 65DC
      created ....: 2010-10-22 06:06:36
General key info..: pub  rsa2048/00B45EBD4CA7BABE 2010-10-15 NIIBE Yutaka <gniibe at fsij.org>
sec>  rsa2048/00B45EBD4CA7BABE  created: 2010-10-15  expires: never     
                                card-no: F517 00000001
ssb#  secp256k1/824E72CE975B9053  created: 2014-01-16  expires: never     
ssb>  rsa2048/79A79093084239CF  created: 2010-10-15  expires: never     
                                card-no: F517 00000001
ssb>  rsa2048/9C33B6BA5BB065DC  created: 2010-10-22  expires: never     
                                card-no: F517 00000001
Reader ...........: 234B:0000:FSIJ-1.2.2-87193059:0
Application ID ...: D276000124010200FFFE871930590000
Version ..........: 2.0
Manufacturer .....: unmanaged S/N range
Serial number ....: 87193059
Name of cardholder: [not set]
Language prefs ...: [not set]
Sex ..............: unspecified
URL of public key : [not set]
Login data .......: [not set]
Signature PIN ....: not forced
Key attributes ...: ed25519 cv25519 ed25519
Max. PIN lengths .: 127 127 127
PIN retry counter : 3 3 3
Signature counter : 51
Signature key ....: 249C B377 1750 745D 5CDD  323C E267 B052 364F 028D
      created ....: 2015-08-12 07:10:48
Encryption key....: E228 AB42 0F73 3B1D 712D  E50C 850A F040 D619 F240
      created ....: 2015-08-12 07:10:48
Authentication key: E63F 31E6 F203 20B5 D796  D266 5F91 0521 FAA8 05B1
      created ....: 2015-08-12 07:16:14
General key info..: pub  ed25519/E267B052364F028D 2015-08-12 NIIBE Yutaka <gniibe at debian.org>
sec>  ed25519/E267B052364F028D  created: 2015-08-12  expires: never     
                                card-no: FFFE 87193059
ssb>  ed25519/5F910521FAA805B1  created: 2015-08-12  expires: never     
                                card-no: FFFE 87193059
ssb>  cv25519/850AF040D619F240  created: 2015-08-12  expires: never     
                                card-no: FFFE 87193059
$ 
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