Add descriptions of DRD and Ptrcheck in the manual intro.  Bart, Julian,
please change these if you don't like what I've written, and merge the
changes to the 3.4.X branch.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10215 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed