Pullup ticket #3647 - requested by gdt

Pullup ticket #3647 - requested by gdt
filesystems/tahoe-lafs: security update

Revisions pulled up:
- filesystems/tahoe-lafs/Makefile                               1.10
- filesystems/tahoe-lafs/distinfo                               1.7
- filesystems/tahoe-lafs/patches/patch-aa                       1.2

---
   Module Name:	pkgsrc
   Committed By:	gdt
   Date:		Fri Jan 13 01:14:56 UTC 2012

   Modified Files:
   	pkgsrc/filesystems/tahoe-lafs: Makefile distinfo
   	pkgsrc/filesystems/tahoe-lafs/patches: patch-aa

   Log Message:
   Update to 1.9.1 (security fix):

   Release 1.9.1 (2012-01-12)
   --------------------------

   Security-related Bugfix
   '''''''''''''''''''''''

   - Fix flaw that would allow servers to cause undetected corruption when
     retrieving the contents of mutable files (both SDMF and MDMF). (`#1654`_)

   .. _`#1654`: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1654