Various resource leaks in various parts of Tor (found by coverity scan)
We've got coverity running on our code again, and predictably, it's found a few resource leaks. Most are leak-on-hard-to-trigger-error cases, but one or two are repeating leaks on a successful operation.
This is an omnibus ticket for the lot of them, so I can point to something and say "please review this."
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