Improvements
- Fix crash processing some TNEF documents (85053e8)
- Fix incorrect mapping of ISO charsets to ISO-8859-1, thanks @nerull7
- Fix handling of GBK charset when gb2312 is advertised (#2000)
- Disambiguate staff and collaborators when processing a some emails (#1983)
- Improve detection of some bounce notices with alternative content (#1994)
- Fix upgrade crash if retrying an old, failed upgrade from v1.6 (#1995)
- Preserve internal note formatting on new ticket by staff if HTML is disabled (#2001)
- Fix deployment on Windows® platforms, thanks @yadimon (#2033)
- Fix corruption of some html content (0072c46)