fix(middleware): simplify stripHost. #3115
Merged
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The stripHost middleware only adds a modified url to the request.
That modified url is only used one place. By converting the middleware
to a module, the code is simpler and beforeMiddleware modules can reuse
karma middleware. (One alternative considered was to move the stripHost
in the chain before the beforeMiddleware, but this form seems better).
Clean up regex per offline suggestion from zzo@