The argument given to the __attribute__((cleanup)) functions is the
address of the variable that's going out of scope. It cannot be NULL.
The "if (!s)" check in set_freep() is pointless.
Perhaps "if (!*s)" was intented. But that's pointless too, because
set_free()/set_free_free() are OK to call with a NULL argument (just
like free()).
Setting "*s = NULL" is pointless, because the variable that s points
to is about to go out of scope.
The same holds for strv_freep().
In some cases, like wrong configuration, restarting after error
does not help, so administrator can specify statuses by RestartPreventExitStatus
which will not cause restart of a service.
Sometimes you have non-standart exit status, so this can be specified
by SuccessfulExitStatus.
We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.
Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.
The bits that used to be MIT continue to be MIT.
The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.
