Fix SSLv2 interface

- apply patch from debian bug# 637904 to remove SSLv2 method if disabled
    in libopenssl (which it is in latest version)

ref: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637904
Update build metadata

- reset version to 0.21.1
- set tag to post-release tag: vayana
- update changelog

also, ignore build artifacts and swap files
Modified version to include vayana rather than from tag.

Did it primarily since wasn't sure if git based install would be able to understand version based on tag