Changes to squid-4.2 (04 Aug 2018):
- Regression fix: support for https_port clientca= option
- Regression Bug 4870: milliseconds logformats prepend 0s instead of spaces
- Bug 4861: HTTPMSGLOCK missing pointer safety
- Bug 4843 pt3: GCC-8 fixes and refactoring
- HTTP: Do not update stored headers on 304 responses
- Fix segmentation fault on -k parse
- Fix %>ru logging of huge URLs
- ... and several performance optimizations
- ... and some documentation updates
- ... and all fixes from 3.5.28