msvc: disable warning #4996
msvc: disable warning #4996

This warns about things like using "open" instead of "_open".  Even
if we "fixed" all those in Squash, we're unlikely to get plugins to
cooperate.  That said, I don't see much of a reason to prefix these
functions with underscores (MS's wish to deprecate perfectly usable
functions isn't a good reason).

Cloudef/squash,jibsen/squash,Cloudef/squash,jibsen/squash,quixdb/squash,quixdb/squash,jibsen/squash,Cloudef/squash,quixdb/squash