allow WebSocket servers operate without URL
allow WebSocket servers operate without URL

oberstet/autobahn-python,nucular/AutobahnPython,schoonc/AutobahnPython,RyanHope/AutobahnPython,Geoion/AutobahnPython,dash-dash/AutobahnPython,iffy/AutobahnPython,oberstet/autobahn-python,claws/AutobahnPython,hzruandd/AutobahnPython,luhn/AutobahnPython,tavendo/AutobahnPython,iffy/AutobahnPython,crossbario/autobahn-python,dash-dash/AutobahnPython,ttimon7/AutobahnPython,iffy/AutobahnPython,crossbario/autobahn-python,mcfletch/AutobahnPython,mcfletch/AutobahnPython,inirudebwoy/AutobahnPython,claws/AutobahnPython,crossbario/autobahn-python,bencharb/AutobahnPython,dash-dash/AutobahnPython,tomwire/AutobahnPython,markope/AutobahnPython,iffy/AutobahnPython,dash-dash/AutobahnPython,Jenselme/AutobahnPython,jvdm/AutobahnPython,meejah/AutobahnPython,oberstet/autobahn-python