* don't use RELENG_5 anymore
* don't mention CVS explicitly when the text applies to any version control system
* introduce Subversion (pointers and its usage in the src tree)
* don't mention ncvs as a CVS commit host anymore
* replace all sys/*fs examples in the practical CVS primer by analogous ports/Tools examples
* use ISO yyyy-mm-dd date format for -D flag of cvs
* mention that Subversion stores metadata in .svn directories
* remove text concerning the -j flag of cvs
* mention svn-committers and that it is a normal read/write list
* remove most of q&a 16.2, point to SubversionPrimer/Merging on the wiki instead
Reviewed by: trhodes, gabor, keramida
Approved by: keramida
e2718a3657