[squid-users] applying patch files

[Andrej G. Zadorozhnyj]

I have Squid 2.5 Stable 4 installed from port tree (portrevision 10 FreeBSD
4.9) and I want to install by hand (because there is not new port revision
in port tree yet) new patch files, but I don't known how to do it! Can
anybody  explain me how to do it correctly?
Andrej.