Allows user to change the semantics of `sslmode` to be as close as possible to libpq semantics. The opt in can be enabled using `useLibpqCompat` parsing option or the non-standard `uselibpqcompat` query string parameter.
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Co-authored-by: Charmander <~@charmander.me>
Co-authored-by: Herman J. Radtke III <herman@hermanradtke.com>