Ability to define commit keywords per tracker (#7590).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12208 e93f8b46-1217-0410-a6f0-8f06a7374b81
Migrate settings according to r12208 (#7590).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12209 e93f8b46-1217-0410-a6f0-8f06a7374b81
Fixed that the mail method should return a Mail::Message (#15113).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12210 e93f8b46-1217-0410-a6f0-8f06a7374b81