Fix for olllllld bash

Bash 2.05 does not include the =~ operator for regexps, so we get round this in inventive ways to overcome the shortfallings of a default debian sarge install (I really wish they'd made bash3 the default in that release!)
git-archimport-id: arch@sommitrealweird.co.uk--2005-desktop/rpmbased-dist-chroot--mainline--0.1--patch-2