- makefile: fix install play.d

- tools_json: replace egrep with grep -E
- eget: add -H (--header) support
- epm play icq: get latest version from snapcraft.io
- distr_info: fix Manjaro support
- epm ei: use --auto in pipe mode
- generic-appimage.sh: use cd & run (some progs runs only relative to current dir)
- epm play: add clibgrab
- eepm.spec: move install code to Makefile
- eepm.spec: update Source URL
- remove yum subpackage (will pack separately)

- epm play: add cnrdrvcups-ufr2 support
- epm repo add/remove: add korinf support
- erc-sh-archive: add diag message if backend is missed
- erc-sh-archive: add checking for 7zr and 7zz
- epm-sh-functions erc(): check if some erc backend is installed and install p7zip if missed
- epm-repack: add p7zip require
- allow EPM_BACKEND and SERV_BACKEND to force backend to use
- epm-release_upgrade: remove apt-conf-sisyphus only if installed