Merge branch 'hotfix/1.19.3' into stable
1.19.4
Allow git-core if git is missing.
Conflicts:
	scripts/functions/requirements/ubuntu
Check for preinstalled packages. Fixes #1795.
Merge branch 'hotfix/1.19.4'

Conflicts:
	scripts/functions/requirements/ubuntu
NEXT: 1.19.4 ready
improve autolibs help