title: How can I easily apply a bugfix on several release branches in Git?
body: <p>I've been using git for a while for my one-man developments, but I haven't run into any tricky branching issues until now and I seem to have forgotten something fundamental that I no doubt "knew" just after reading the Pragmatic Version Control Using Git Book..</p>
  
  <p>I'm often several releases ahead of what is actually published on my website, so that when a bug report comes in, I only apply them to the current master branch rather than fixing them in the next released version. Of course, I'd like to change that to get fixes out quicker.</p>
  
  <p>Let's say 1.0 was just released, 1.1 is going to be released soon, but I'm already working on 1.3, e.g.  </p>
  
  <pre><code>1.0 - released  
  1.1 - finished  
  1.2 - finished  
  1.3 - in development  
  </code></pre>
  
  <p>A bug report comes in.. usually this would be fixed in 1.3, but how do I fix it in 1.1 instead?  </p>
  
  <p>As far as I am aware in svn and other "traditional" source control systems, I would need to branch B.1.1 and B.1.2 and apply the changes to each branch in turn, then build from each branch and finally apply the fix to the master branch.</p>
  
  <p>I seem to remember that git, however, does something clever: I branch B.1.1, make the changes there, do {something} and B.1.2 and the master branches are automagically updated with the fix. Is this possible or did I imagine {something}?</p>