This adds some new debugging code to make it easier to see why a process is at
a certain oom_adj level -- for example telling you that a certain other process
has a binding to a certain one of its services. This has helped a lot in
identifying cases where processes are holding references to other processes that
they don't need and thus not allowing the system to get memory it needs.
Also fix a few problems with leaking entries on the service restarting and
service stopping lists.
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