Enable reverse proxy load balancing

Enable reverse proxy load balancing across multiple origin servers
Merge pull request #634 from darkain/patch-3

Enable reverse proxy load balancing
squid3-dev - improve captive portal and custom options acls
squid3-dev -fix icp port default disable option
Thanks to Tikimotel and bellera
squid3-dev - add option to enable and disable ICMP pinger helper
Thanks to bellera
Add pulledpork as a direct dependency to snort
Revert "Add pulledpork as a direct dependency to snort"

pulledpork is not used on pfSense according eri

This reverts commit df234443c3012964e2d17d02abb3c814a8f41ddd.
Unset PULLEDPORK option from snort package