title: Matching SVN commits without a valid JIRA issue to a catch all ticket
body: <p>My client's team lead has asked me to integrate his team's SVN repository with JIRA, so that all source SVN commits show up against JIRA tickets. To achieve this I have activated the JIRA SVN plugin, and written a pre-commit script to reject commits which do not contain a valid JIRA issue.</p>
  
  <p>This task is slightly complicated because a senior member of the team has reservations about driving source control workflow from JIRA issues. As a compromise until the process solidifies, I have been tasked with adding a backdoor '#nojira' to the pre-commit hook. SVN commits containing #nojira will be permitted, but a catch all ticket PROJECT-CATCH_ALL_ISSUE_NUMBER should record these commits.</p>
  
  <p>While there's an obvious alternative solution to this problem (:)) does anybody know of a way to set up a mapping like PROJECT-CATCH_ALL_ISSUE_NUMBER -> #nojira in JIRA's SVN plugin?</p>
  
  <p>I have considered modifying the commit message in the post commit hook to replace #nojira with the catch all issue ID but that also seems wrong on several levels.</p>