Changes 3.3.7:
* Protect against buffer overrun in DNS query generation
* SourceFormat Enforcement
* Bug 3297: Fix openSSL related build failures
* Fix build on FreeBSD 9.x platform with clang
Updated www/squid3 to 3.3.7
Match textproc/libxslt version
Updated textproc/py-libxslt to 1.1.28