Option to auto escape characters not allowed in sonar branches

In light of http://jira.codehaus.org/browse/SONAR-4188, there are some branch names that just aren't allowed.

In our Sonar configuration we'd like to set the 'Branch' field to '${GIT_BRANCH}'

Due to '/' being commonly used in git branches, we'd like to add a checkbox under the branch field called 'Escape invalid branch characters' so any invalid character is automatically changed to underscore '_'.

We plan on submitting a patch for this - I'm hoping you will consider applying it.