Tested gtm-reconnect

Now gtm-reconnect works with pgxc_ctl c version.

Work inprogress

Today, did the following:

1. Resolution of 9.2.3 merge with XC master.
2. Test and debug pgxc_ctl C-version.  Now it can configure all the slaves.  Failover test will be done next.

Need to write the book chap1.