improve logging on lost connection
improve logging on lost connection

nucular/AutobahnPython,jvdm/AutobahnPython,hzruandd/AutobahnPython,oberstet/autobahn-python,crossbario/autobahn-python,oberstet/autobahn-python,meejah/AutobahnPython,tavendo/AutobahnPython,crossbario/autobahn-python,markope/AutobahnPython,crossbario/autobahn-python,oberstet/autobahn-python,inirudebwoy/AutobahnPython,schoonc/AutobahnPython,ttimon7/AutobahnPython,RyanHope/AutobahnPython,Jenselme/AutobahnPython,Geoion/AutobahnPython