Log Message:
Update "squid31" package to version 3.1.8. Changes since 3.1.7:
- Security fixes:
 - Fixes for the request processing vulnerability tagged SQUID-2010:3.
   http://www.squid-cache.org/Advisories/SQUID-2010_3.txt
 - A hardening of the DNS client against packet queueing approaches
   used to enable attacks. This completes the protection against attacks
   published by Yamaguchi late in 2009.
 - An HTTP request-line parser hardened against several categories of
   request attack. This greatly increasing the speed of detection and
   reducing resources used to detect these categories of attack.
- Fixes for the following bugs:
  - Bug 3020: Segmentation fault: nameservers[vc->ns].vc = NULL
  - Bug 3005,2972: Locate LTDL headers correctly (again)
  - Bug 2872: leaking file descriptors
  - Bug 2583: pure virtual method called