BUG #7652: Documentation index lacks functions from "Additional Supplied Modules"

The following bug has been logged on the website:

Bug reference:      7652
Logged by:          Andreas H.
Email address:      Andreas.Heiduk@web.de
PostgreSQL version: 9.2.1
Operating system:   any
Description:        =


It seems, that none of the functions in the section "Additional Supplied
Modules" are listed in the index. I checked both the "intagg" module and the
"dblink" module.

To bad if you are looking the documentation of a function but don't know
which module provides it (if any at all).