Error in date_part epoch docs.

This one had me worried for a while:

>From functions-datetime.html...

epoch
For date and timestamp values, the number of seconds since 1970-01-01
00:00:00 (Result may be negative.); for interval values, the total number of
seconds in the interval

This is incorrect, it's from 1970-01-01 08:00:00

eg:

australia=# select date_part('epoch', '1970-01-01 08:00:00'::timestamp);
date_part
-----------
0
(1 row)

australia=# select date_part('epoch', '1970-01-01 00:00:00'::timestamp);
date_part
-----------
-28800
(1 row)

This is a trivial change so I won't bother submitting a patch...

Chris