www/squid: Upgrade version 2.7.9 => 3.4.7

From now on, there will only be one squid port, this one.  Squid33 has
been deprecated and will expire on 31 JAN 2015.

PR:		192828
Submitted by:	timp87 (gmail)
Contributions:	takefu (airport.fm), Dennis Glatting
Fixup for qemu assisted builds.  This float handling seems to be an unhandled
qemu bug, but the code itself is arguably wrong as well.  Apply this patch atop
the tar ball and move on.

Phabric:  https://reviews.freebsd.org/D746
Submitted by:	nox
Reviewed by:	kwm
Approved by:	bapt (mentor)
www/squid33: Update deprecation message with a more accurate EOL date