timeouts 407 B

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  1. o Minor features (infrastructure):
  2. - Tor now includes an improved timer backend, so that we can efficiently
  3. support tens or hundreds of thousands of concurrent timers, as will be
  4. needed for some of our planned anti-traffic-analysis work. This code
  5. is based on William Ahern's "timeout.c" project, which implements
  6. a "tickless hierarchical timing wheel". Closes ticket #18365.