- improve homebrew support
- serv: add edit support for systemd
- fixes for ALT p9 detection
- epm query_file: use -- after options
- use external distro_info on non ALT systems
- epm: add support for a few tasks in addrepo/removerepo/install
- upgrade: add support for epm upgrade TASK (upgrade only already installed packages)
- remove TASK: remove all packages from the TASK
- release_upgrade: install alt-gpgkeys firstly