Show the user how to connect her browser

[dothebart]

Our last log message is: 2017/04/13 14:50:30 coordinator up and running. - Please add here the information how the user is then able to connect to the coordinator with her browser or clients aka

2017/04/13 14:50:30 coordinator up and running. You can connect it with your browser on http://...:8530/ or using arangosh --server.endpoint http+tcp://...

To reduce the possibility of user errors, Each window should print 3 blank lines, followed by this message.