Ports conflict with CrashPlan by default

[HerbCSO]

CrashPlan by default uses ports 4242 and 4243 for its service control between the main service and the UI. Unfortunately it appears that ncsvc also wants to bind to port 4242 when starting up, so if you have CrashPlan running, you get an error in the ncsvc log:

IpcConn.error bind failed to port 4242. Error 98 (ncipc.cpp:75)

Could we add a reference to the docs to look out for that? You can follow these instructions to change the port numbers CrashPlan uses (since unfortunately I don't think there is an option to change ncsvc's ports).