- Remove cvs(1) references.
- Remove CVS* environment references.
- Add default entries for the default SVNROOT for the Ports
Collection, and Documentation Project.
- While here, update 'SGML-based documentation' to 'XML-based',
since the recent SGML->XML conversion.
- Update an example providing SVNROOT environment usage.
Reminded by: nwhitehorn
MFC After: 1 week
X-MFC-With: r240586, r240587