Short documentation to mention use of Mime::Type.register. Closes #5710 [choonkeat@gmail.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4665 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Short documentation to mention use of Mime::Type.register. #5710 [choonkeat@gmail.com]
+
 * Make controller_path available as an instance method.  #5724 [jmckible@gmail.com]
 
 * Update query parser to support adjacent hashes. [Nicholas Seckar]

actionpack/lib/action_controller/mime_responds.rb

@@ -92,6 +92,12 @@ module ActionController #:nodoc:
       # Note that you can define your own XML parameter parser which would allow you to describe multiple entities 
       # in a single request (i.e., by wrapping them all in a single root note), but if you just go with the flow 
       # and accept Rails' defaults, life will be much easier.
+      # 
+      # If you need to use a MIME type which isn't supported by default, you can register your own handlers in
+      # environment.rb as follows.
+      # 
+      #   Mime::Type.register "image/jpg", :jpg
+      # 
       def respond_to(*types, &block)
         raise ArgumentError, "respond_to takes either types or a block, never both" unless types.any? ^ block
         block ||= lambda { |responder| types.each { |type| responder.send(type) } }
@@ -167,4 +173,4 @@ module ActionController #:nodoc:
       end
     end
   end
-end
+end