* gnu/services/pm.scm (tlp-shepherd-service): Make destructor
return #f on success. Destructor "should return #f if it is
now possible again to start the service at a later point"
(shepherd manual).
Change-Id: Ic0d21d32af158da1ae940d9c32c05a3471767764
Signed-off-by: Ludovic Courtès <ludo@gnu.org>