pgsql-server: Add: > * Add a function that returns the 'uptime' of the

Log Message:
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Add:

* Add a function that returns the 'uptime' of the postmaster

Modified Files:
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pgsql-server/doc:
TODO (r1.1337 -> r1.1338)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/TODO.diff?r1=1.1337&r2=1.1338)