[tor-bugs] #23602 [Core Tor/Tor]: Detect homebrew OpenSSL on OSX (was:Fix compilation on macOS)

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#23602: Detect homebrew OpenSSL on OSX (was:Fix compilation on macOS)
-------------------------------------------------+-------------------------
 Reporter:  hellais                              |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  merge_ready
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.1.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  029-backport, 032-backport, 031      |  Actual Points:
  -backport-maybe, 030-backport-maybe            |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by hellais):

 Cherry picking da36def955ca749230896c219251ba52181688c0 into master it
 works for me on macOS 10.12.6 and Homebrew 1.3.4 without any additional
 configuration:

 {{{
 ./autogen.sh && ./configure && make
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23602#comment:14>
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