Is the handbook on buildworld accurate?

[Clint Olsen]

The instructions in the handbook:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html

say to run 'make installworld' after running 'mergemaster -p'.  I have
successfully (to my knowledge) run mergemaster, and the master password
file in /usr/src does have the 'proxy' user.  However, installworld fails
because user 'proxy' is non-existent.  The manpage for mergemaster says
that -p is a pre-buildworld switch, but that's not what the handbook says
to do.

What am I missing?

-Clint