Dron's thoughts attic

http://www.havp.org/havp-teamwork-with-other-proxys-e-g-squid/

https://unix.stackexchange.com/questions/36627/how-to-telnet-via-proxy-authentication

http://xgu.ru/wiki/Squid,_Kerberos_%D0%B8_LDAP

http://artica-proxy.com/ - squid based proxy multitool