www/squid: cleanup, adding patches

1. Turn ON all options that don't require external dependencies.
2. Split SMB options to more items to make it possible to compile squid with samba36 and samba42.*
3. Set databases/p5-DBI as a dependency for SQL option and add note to pkg-message about perl DBD drivers.*
4. Add fix for PF+IPv6.**
5. Require SSL option if SSL_CRTD is on.
6. Small fixes.
7. Add all available patches from upstream.

• thanks to Alonso Cardenas Marquez!
  • thanks to Orlando Bassotto!

PR: 208290
Submitted by: Pavel Timofeev <timp87@gmail.com> (maintainer)