Fix documentation of 'proxy=' to match code
Fix documentation of 'proxy=' to match code

RyanHope/AutobahnPython,oberstet/autobahn-python,meejah/AutobahnPython,crossbario/autobahn-python,oberstet/autobahn-python,crossbario/autobahn-python,markope/AutobahnPython,tavendo/AutobahnPython,crossbario/autobahn-python,oberstet/autobahn-python,Jenselme/AutobahnPython