* develop: (48 commits)
  fix tsdb log format
  [TD-276] add user auth
  fix drop table coredump
  [td-225]
  [td-225] FIX BUGS IN DIFF
  add log in tsdb
  Additional fix for TD-225
  forward to peer only the data packet is from client or CQ
  [td-225] fix bug in diff query
  [td-225]
  [td-225] fix bugs in tags filter query
  scripts
  scripts
  [TD-271]
  support RpcIpSet change
  [TD-271] fix bug while drop stable
  integer division yields float in python3.
  change tables to maxtables according to Dr. Liao
  fixup: fix make command to make coverity_scan work.
  add log for database create
  ...