Log Message:
Update to 3.1.2:

2012/05/13: version 3.1.2 = tag release-3-1-2 (expect no binary updates)
7726: Add support for Debian/Hurd, really ;)

2012/04/05: version 3.1.1 = tag release-3-1-1

2012/04/04
7732: Remove the non-existant -O6 optimization level (blickly)
7755: CryptoPP: Fix build with GCC 4.7

2012/02/22
7728: Update GNU config.guess and config.sub to version 2012-02-10
7727: Makefile: call `$(CPP) -x c` instead of `cpp` (ygrek)
7726: Add support for Debian/Hurd

2011/10/25
7647: Update options description of allow_local_network (ygrek)
7646: Include .desktop file in source package (ported from Arch Linux)
7645: DC: show hashing progress in dcinfo (ygrek)
7644: Fix broken target release.utils.static
7642: Update GNU config.guess and config.sub to version 2011/10
7641: DC: fix ownership for downloads by non-admin users (ygrek)
7593: Less allocations (ygrek)