This makes it possible to support URLs that end in ) but are in another ()

This logic is torture and needs some rework.

Rules:

- Always strip leading (, as it can't be part of a URL
- Short circuit to only strip leading if no trailing
- If valid email address when trailing ) stripped, we can strip trailing )
- If not even a valid URL without trailing ), short circuit to only strip leading
- If query parameters detected, strip trailing. It should have been encoded as %29.
- If there isn't a / the trailing ) can't be part of the URL, strip trailing.
- If there isn't at least one ( in the URI.path, only strip leading. Assume ) is not part of the URL.
- If we have an equal count of ( and ) chars with the leading ( already stripped, only strip leading

thx @href !

Fixes: pleroma/pleroma#1656

Refactor parser