I've added two release notes to Applications 18.12 https://community.kde.org/Applications/18.12_Release_Notes
- kio-extras optionally depends on libappimage, however this library has not had a release and is being rewritten so it best ignored for now - kopete does not compile with openssl 1.1, you can try the patch used by KDE neon to make it compile from Arch via Fedora, review of patch Jonathan
