pgsql: Complete the following TODO items: * Add session start time to

Log Message:
-----------
Complete the following TODO items:

* Add session start time to pg_stat_activity
* Add the client IP address and port to pg_stat_activity

Original patch from Magnus Hagander, code review by Neil Conway. Catalog
version bumped. This patch sends the client IP address and port number in
every statistics message; that's not ideal, but will be fixed up shortly.

Modified Files:
--------------
pgsql/doc/src/sgml:
monitoring.sgml (r1.27 -> r1.28)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/monitoring.sgml.diff?r1=1.27&r2=1.28)
pgsql/src/backend/catalog:
system_views.sql (r1.11 -> r1.12)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/system_views.sql.diff?r1=1.11&r2=1.12)
pgsql/src/backend/postmaster:
pgstat.c (r1.92 -> r1.93)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/pgstat.c.diff?r1=1.92&r2=1.93)
pgsql/src/backend/utils/adt:
pgstatfuncs.c (r1.20 -> r1.21)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/pgstatfuncs.c.diff?r1=1.20&r2=1.21)
pgsql/src/include:
pgstat.h (r1.27 -> r1.28)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pgstat.h.diff?r1=1.27&r2=1.28)
pgsql/src/include/catalog:
catversion.h (r1.266 -> r1.267)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h.diff?r1=1.266&r2=1.267)
pg_proc.h (r1.360 -> r1.361)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h.diff?r1=1.360&r2=1.361)