Need instructions to upgrade squid

["Agrawal, Devendra \(Indust, PTL\)" <devendra.agrawal@xxxxxxxxxx>]

Hi,

I am looking for instructions to upgrade squid Version 2.5.STABLE8 to
squid-2.5.STABLE12. Does it has to be a fresh install of new version or
it is possible to keep the current configuration (like squid.conf and
other configuration files) intact even after installing the new version?


Thanks ,

Devendra Agrawal