scm: model: add method to switch revision graph support or not and set default false (#5501)...
scm: model: add method to switch revision graph support or not and set default false (#5501)
git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7716 e93f8b46-1217-0410-a6f0-8f06a7374b81