Log Message:
Update to 2.0.20:

Noteworthy changes in version 2.0.20 (2013-05-10)
-------------------------------------------------

 * Decryption using smartcards keys > 3072 bit does now work.

 * New meta option ignore-invalid-option to allow using the same
   option file by other GnuPG versions.

 * gpg: The hash algorithm is now printed for sig records in key listings.

 * gpg: Skip invalid keyblock packets during import to avoid a DoS.

 * gpg: Correctly handle ports from DNS SRV records.

 * keyserver: Improve use of SRV records

 * gpg-agent: Avoid tty corruption when killing pinentry.

 * scdaemon: Improve detection of card insertion and removal.

 * scdaemon: Rename option --disable-keypad to --disable-pinpad.

 * scdaemon: Better support for CCID readers.  Now, the internal CCID
   driver supports readers without the auto configuration feature.

 * scdaemon: Add pinpad input for PC/SC, if your reader has pinpad and
   it supports variable length PIN input, and you specify
   --enable-pinpad-varlen option.

 * scdaemon: New option --enable-pinpad-varlen.

 * scdaemon: Install into libexecdir to avoid accidental execution
   from the command line.

 * Support building using w64-mingw32.

 * Assorted bug fixes.