add gateway connect exception trace
k_pmon add rerun_job
logger use unshift to add group type at head
allow detect quitting signal on new connection
handle multiple packet for connection head info
onHandshake prevent endless recursive call
bugfix tailing 0 for connection head, use /080526
chunked connection head can not use c.unshift
gateway timeout reconnect allow one more request
use on readable, not afraid of data after res end
db.js removeListerner rm the same handler as add