Check if we need to keep memlockd running longer
Originally created by @intrigeri on #8260 (Redmine)
Our previous usage of sendsigs.omit.d to prevent sysvinit from killing memlockd on shutdown doesn’t work with systemd. We should evaluate if it’s worth keeping memlockd running a few more seconds, and if it is, then we should find a way to keep it around as late as possible.
If we do need to keep it around, http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons/ should be a good starting point.