I knew there were 2 different docu-versions but obviously took the old one (https://openacs.org/doc/current/aolserver4.html).
I found the new cvs-server urls at sourceforge and thought the docu was outdated.
Probably one should put a "warning" at the old docu-page with a link to the new one.
cvs.sourceforge.net
to
aolserver.sourceforge.net
Notice Sourceforge has added now aolserver (proyect name) to their public cvs
I mean aolserver.cvs.sourceforge.net Thereis no route to host cvs.sourceforge.net