nix: updated package defs after release

release: Bump version 4.3.0 to 4.4.0

release: merge back stable branch into default

Added tag v4.3.0 for changeset 6627ff411972

release: Finish preparation for 4.3.0

release: Merge default into stable for release preparation

core: manifest remove obsolete entries

core: added MANIFEST.in file to add additional files in package

Mercurial: bumped version to 3.8.4 as latest bugfix release.

configs: symlink standard names to new files (default http backend)