Allow macros with parameters

[v0tti]

This fixes #2432 by adding a matchRegex parameter. It should not break any existing use cases and just allows for more flexibility when using "Apply For" rules.

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Alexander Votteler.
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[v0tti]

I added the commit email address to my GitHub account, should be good now.

[nilmerg]

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[v0tti]

I have signed the CLA now.
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[bobapple]

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