Update pginterface for 6.4. add manual page.

Bruce Momjian <bruce@momjian.us>

Commit: a5d4642578e1ea4f2c414e7c94d8115890c0a814
Author: Bruce Momjian <bruce@momjian.us>
Date: 1998-09-11T05:14:08Z
Releases: 7.1.1
Update pginterface for 6.4. add manual page.

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