Fixes #4705: On AIX, several techniques try to use the group "root"
Merge pull request #333 from jooooooon/bug_4705/on_aix_several_techniques_try_to_use_the_group_root

Fixes #4705: On AIX, several techniques try to use the group "root"
Fixes #4707:  On AIX, several techniques try to use the group "root" - fix initial promises
Merge pull request #334 from jooooooon/bug_4707/on_aix_several_techniques_try_to_use_the_group_root_fix_initial_promises

Fixes #4707:  On AIX, several techniques try to use the group "root" - f...