GUC and postgresql.conf docs

Folks,

I'm trying to prepare comprehensive documentation on the contents of the
postgresql.conf file for 7.3.2.   However, I'm running into some confusion in
the docs (which is why I'm preparing the document in the first place).

Can I aassume that any setting documented under "3.4. Run-time Configuration"
is a GUC variable modifiable through a SET statement?  If not, where can I
find documenation on which .conf settings are GUC variables and which are
not?

Thanks ... this'll go up at Techdocs when I have a draft together.

--
Josh Berkus
Aglio Database Solutions
San Francisco