title: Jenkins scm user<->mail mapping. How to dump / restore / edit via cli
body: <p>When setting up a new Hudson/Jenkins instance i run into the problem that i have to manually provide all the email addresses for the scm users. </p>
  
  <p>We are using subversion and i can't generate the mail addresses from the usernames. I got a mapping but i found no way to copy / edit that without making use of the gui. With 20+ users that gets boring and i'd like to have just edit a file or something.</p>
  
  <p>Maybe i'm missing some trivial thing like a scmusers.xml (which totally would do the job) ?</p>