Addition of module_feedback_send.
Every 30 second data is sent to 127.0.0.1
Missing routines for configuration parameters and blocking the send
after successful completion
This keeps the behavior the same but allows the heartbeat to be used as a crude timer
without including everything the housekeeper.h header includes.
Moved the protocol level updates on the DCBs last_read value into dcb_read.
This keeps the implementation nice and compact.
mysql_backend.c:gw_change_user: instead of setting flags directly to replybuffer, set server command to backend's protocol object and reply the message directly to backend where flags are set and it is replied back to client.
RWSplit router handles query processing errors that happened in router by sending parse error reply to client. routeQuery fails only when backend has failed.
When no users are loaded from backends, instead of counting it as a failure the service is started and the next time a client connects an attempt to load the users from the backends is made.
service.h:Added the 'serviceStartFailed' function which tries to start services with successfully started routers but no successfully started listeners.
mysql_mon.c:Added a call to ServiceStartFailed when servers come available.
Added server references to services instead of using a raw pointers to server instances.
Changed all references to service->database to service->dbref.
tee.c:routeQuery cloned partial MySQL packets to be routed to child router. Problems were due to the use of gwbuf_clone and modutil_MySQL_query which clone/examine only the first buffer from the buffer list which composes GWBUF.
modutil.c: Added function modutil_MySQL_query_len which calculates MySQL packet length and the missing bytecount
Added clientReply and setUpstream entry points
Tee filter now waits for the branch session to be replied to and if the reply isn't received in five seconds it closes the branch session.
dcb.h:
Added the DCBF_REPLIED flag that is currently only set in dcb_null_write
dcb.c:
The DCBF_REPLIED flag is now set in dcb_null_write
