lint version hardcode

[Rainer Müller]

nox wrote:
> I haven't looked at the source but I think it just searches ${version}  
> in the Portfile after having read it, and triggers the warning if it's  
> not the version command. So if I'm right, the answer is yes.

The regex currently being used for exclusion is
{^PortSystem|^PortGroup|^version|^(perl5|ruby|haskell).setup}

And I added php5extension.setup to it in r50226.

Rainer