Binary package “squid3” in ubuntu xenial

Dummy transitional package.

 Squid is a high-performance proxy caching server for web clients, supporting
 FTP, gopher, ICY and HTTP data objects.
 Squid version 3 is a major rewrite of Squid in C++ and introduces a number of
 new features including ICAP and ESI support.
 This is a dummy transitional package used to migrate from squid3 to squid.