Add HLint configuration, excluding infinite filesystem loop. #3763
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Overview
I tried running HLint over the codebase but it ran forever and was killed, see #3746.
Implementation notes
Excludes the the symlinks that make the filesystem loop so that HLint can run.
Interesting/controversial decisions
I opted to also ignore all current hints with the
--default
option. This is a clean starting point from which we could remove the hint ignores one-by-one as we fix them, if that is what we want to do with #3747.