Some combination of these options were causing problems with the
functionality of restart.sh as described in the comment and in detail in
issue #7503.
While these seem OK on their face, the implications of this breaking
restart.sh means that they could potentially break other things too.
Thus, we should move these into the optional override file which is in
the administrator's full control, instead of in the default unit, and
leave them off unless a user or package maintainer (e.g. NixOS as
described in the original issue #6952) wants to enable them.
Fixes#7503
Joshua M. Boniface