- build: Enable pcre2 for regex matching (bsc#1183989)
- Add libprce2-devel as build dependency

- update to 20210205:
* Features
- Add to skip past message headers in pager
- Add function to attachment menu
* Bug Fixes
- Fix detection of mbox files with new mail
- Fix crash on collapsed thread
- Fix group-chat-reply
- Clear the message window on resize
- Do not crash on return from shell-exec if there's no open mailbox
- Abort IMAP open if condstore/qresync updates fetch fails
- Fix smtp crash on invalid $smtp_authenticators list
- Fix pager dropped input on screen resize
- Fix mime forwarding
- Check config after hooks
- Always recreate a mailbox after folder-hook
* Translations
- 88% Slovakian
* Docs
- Adjust doc to explicitly mention $count_alternative
- Restore correct "$sort_re" documentation
- Clarify pattern completion
- Man pages: Clear up "-H" and "-O"
* Build
- Update to latest acutest
- Update to latest autosetup
- Make the location of /tmp configurable