RAT-172: Add note to release notes.

* By default SCM directories and their ignore files are not scanned by RAT. Currently that is:
** SVN
** Git
** Mercurial
** Bazar
** CVS


git-svn-id: https://svn.apache.org/repos/asf/creadur/rat/trunk@1672493 13f79535-47bb-0310-9956-ffa450edef68
2 files changed