[tor-bugs] #16697 [Tor]: set_max_file_descriptors() failures after upgrade to Tor v0.2.7.2-alpha

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#16697: set_max_file_descriptors() failures after upgrade to Tor v0.2.7.2-alpha
------------------------+------------------------------------
 Reporter:  fk          |          Owner:
     Type:  defect      |         Status:  new
 Priority:  normal      |      Milestone:
Component:  Tor         |        Version:  Tor: 0.2.7.2-alpha
 Keywords:  regression  |  Actual Points:
Parent ID:              |         Points:
------------------------+------------------------------------
 After upgrading Tor from v0.2.7.1-alpha to v0.2.7.2-alpha I get a new
 warning message:

 {{{
 Jul 30 16:47:24.820 [notice] Tor 0.2.7.2-alpha (git-36c0ae6f7834af16)
 opening log file.
 Jul 30 16:47:24.821 [notice] {ACCT} Configured hibernation.  This interval
 began at 2015-07-30 07:00:00; the scheduled wake-up time was 2015-07-30
 07:00:00; we expect to exhaust our quota for this interval around
 2015-07-31 07:00:00; the next interval begins at 2015-07-31 07:00:00 (all
 times local)
 Jul 30 16:47:25.033 [warn] {CONFIG} ConnLimit must be at least 32.
 Failing.
 Jul 30 16:48:00.749 [notice] {CONTROL} New control connection opened from
 127.0.1.5.
 Jul 30 16:48:00.808 [warn] {CONFIG} ConnLimit must be at least 32.
 Failing.
 }}}

 With the attached patch the warning is:
 {{{
 [warn] {CONFIG} ConnLimit must be at least 32 but is 0. Failing.
 }}}

 The torrcs do not contain a ConnLimit directive and adding one doesn't
 seem to make a difference.

 Sending SIGHUP or (re-)connecting to the ControlPort results in a new
 warning.

 So far I'm reproducible getting the warning on a relay and on a hidden
 service but not on a pure client.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16697>
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