Bugfix websocket fragmentation if close occurs
Bugfix websocket fragmentation if close occurs

the fragment opcode is set back to default (0xff) if the connection is closed

gatzka/cjet,mloy/cjet,gatzka/cjet,gatzka/cjet,mloy/cjet,gatzka/cjet,mloy/cjet,mloy/cjet,gatzka/cjet,mloy/cjet