Use regex matching for modules that should always fork

[Nihlus]

The current logic used to match module names that should always fork has room for improvement. As exemplified by the recent addition of the FreeIPA modules, which was a rather long list, the ability to use patterns instead of exact string matches would improve readability and long-term maintainability of the mechanism.

This PR changes the module set into a set of regular expression strings and compiles them into a single joint regex that we then use to match against the module name.