This varnish update to version 3.0.7 fixes the following issues:

Security issues fixed:
- CVE-2015-8852: Vulnerable to HTTP Smuggling issues: Double Content
Length and bad EOL. (boo#976097)

Bugs fixed:
- Stop recognizing a single CR (\r) as a HTTP line separator.
- Improved error detection on master-child process communication,
leading to faster recovery (child restart) if communication
loses sync.
- Fix a corner-case where Content-Length was wrong for HTTP 1.0
clients, when using gzip and streaming.
- More robust handling of hop-by-hop headers.
- Avoid memory leak when adding bans.