Fix all spelling errors found by codespell.
Remove all occurences of $Id$.
Update copyright notices, remove Ivo's email address.
Update copyright notices.
Update copyrights, links, email addresses and let Subversion update $Id$ keywords.
Update documentation.
s/sliepen.warande.net/sliepen.eu.org/g s/itimmermans@bigfoot.com/ivo@o2w.nl/g
Merging of the entire pre5 branch.
Added description of the proposed new authentication scheme.