Update "squid3" package to version 3.3.4. Changes since 3.3.3:
- Bug 3831: basic_ncsa_auth Blowfish and SHA support
- Bug 3816: SSL_get_certificate call inside Ssl::verifySslCertificate crashes
- Bug 3794: MacOS: workaround compiler errors and case-insensitivity
- Bug 3781: Proxy Authentication not sent to cache_peer
- Bug 3720 pt1: SourceLayout: shuffle fd_table definition into fde.h
- Bug 3720 pt2: Add missing include in /dev/poll I/O module
- Bug 3674: Improve compiler detection, better support warnings-as-errors on clang
- Add support for TPROXY on BSD
- Fix SSL Bump bypass for intercepted traffic
- Fix memory leaks in ConnStateData pinning
- Fix external_acl.cc "inBackground" assertion on queue overloads
- CacheMgr: fix missing column separator in helper stats
- OpenBSD: libpthreads requires OpenBSD 5.2 or later
- ... and lots of documentation updates
- ... and all changes from squid 3.2.10

This update might fix PR pkg/42568.
Note update of the "squid3" package to version 3.3.4.