MSVC: enable strict warnings #792
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MSVC has been building with /W3 which isn't considered a safe level for modern code. /W4 is recommended, but it too is lacking some recommended options, so we enable /W4 and also the recommended options. We do, however, have to disable a couple of options due to Windows headers not being fully compliant sometimes as well as some things we do in c-ares that it doesn't like, but aren't actually bad.
Fix By: Brad House (@bradh352)