Changes in squid-5.0.3 (05 Jun 2020):
- Bug 5046: FreeBSD lacks open(2) O_DSYNC flag
- Happy Eyeballs: Do not discard viable reforwarding destinations
- Reduced startup time with large rock cache_dirs
- Fix the ABA problem with Ipc::Mem::PageStack::pop() in v5.0.1
- Fix sending of unknown validation errors to certificate validator
- ... and several debug improvements
- ... and all fixes from 4.12