MINOR: protocol: uniformize protocol errors

MINOR: protocol: uniformize protocol errors

Some protocols fail with "error blah [ip:port]" and other fail with
"[ip:port] error blah". All this already appears in a "starting" or
"binding" context after a proxy name. Let's choose a more universal
approach like below where the ip:port remains at the end of the line
prefixed with "for".

  [WARNING]  (18632) : Binding [binderr.cfg:10] for proxy http: cannot bind receiver to device 'eth2' (No such device) for [0.0.0.0:1080]
  [WARNING]  (18632) : Starting [binderr.cfg:10] for proxy http: cannot set MSS to 12 for [0.0.0.0:1080]