Issue 187: Correctly identify unix ControlPort

[meejah]

That is, if a user passes a config with ControlPort set to "unix:/some/path" then we need to connect to that (instead of pretending it's always a port-number)

[coveralls]

Coverage decreased (-0.04%) to 99.491% when pulling 59c72611015d123d0b4edac05510a32cbcba8188 on issue187-unix-control into ee16bfa95b91b044f999cbe9064b9ecee7ebac35 on master.

[coveralls]

Coverage decreased (-0.04%) to 99.491% when pulling 59c72611015d123d0b4edac05510a32cbcba8188 on issue187-unix-control into ee16bfa95b91b044f999cbe9064b9ecee7ebac35 on master.

[coveralls]

Coverage increased (+0.0005%) to 99.527% when pulling baf3967aebc3084b8cf25bc61c4dc0c9e816ec75 on issue187-unix-control into ee16bfa95b91b044f999cbe9064b9ecee7ebac35 on master.

[coveralls]

Coverage increased (+0.0005%) to 99.527% when pulling baf3967aebc3084b8cf25bc61c4dc0c9e816ec75 on issue187-unix-control into ee16bfa95b91b044f999cbe9064b9ecee7ebac35 on master.

[codecov-io]

Current coverage is 99.52% (diff: 100%)

Merging #188 into master will increase coverage by <.01%

@@             master       #188   diff @@
==========================================
  Files            15         15          
  Lines          2747       2750     +3   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits           2734       2737     +3   
  Misses           13         13          
  Partials          0          0          

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