pgsql-server: The attached patch improves pg_ctl's win32 service code to

Log Message:
-----------
The attached patch improves pg_ctl's win32 service code to eliminate
some possible causes of the stale postmaster.pid problem that some users
have reported.

- The service did not properly report that it accepts
SERVICE_CONTROL_SHUTDOWN events, thus it's possible the SCM simply
killed the postmaster on shutdown.

- 'WaitHints' are now given to the SCM to prevent it timing out if
pg_ctl doesn't respond to a control event quickly enough.

- During shutdown, the service checkpoint counter is incremented every
five seconds for up to a minute to prevent the SCM timing out and
assuming the service is not responding.

Dave Page

Modified Files:
--------------
    pgsql-server/src/bin/pg_ctl:
        pg_ctl.c (r1.27 -> r1.28)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/pg_ctl/pg_ctl.c.diff?r1=1.27&r2=1.28)