I only created this as a draft PR because even though this (probably) fixes the original issue as defined in #1288 I'm not really happy with this solution.

Why? Because what if somebody says "hey, now I want to add the port number too!" and if that, why not the protocol too? Etc etc. Meaning we we have to keep adding new flags to RecordSpec and keep passing all of them down the call chain into SnapshotStubMappingGenerator and RequestPatternTransformer.

So I'm wondering if it would not be a better option to have an extension point where a user can provide their own implementation of a SnapshotStubMappingGenerator. Wdyt?

I think a flag for each is the way to do it, but you could change SnapshotStubMappingGenerator so that it just takes the whole RecordSpec object as a parameter instead of having to unpack the individual attributes.