Fixed a reference in the user manual.
This was reported by Seb at https://mail.gna.org/public/relax-devel/2008-04/msg00036.html (Message-id: <20080407163004.gw8s4400w4wsocso@...>).
Authored by: bugman 2008-04-07
Parent: [r5395]
Child: [r5397]
