Improving the documentation for svn write access.

Ssh does not work, you will be prompted for your sf password
and linked to the sf documentation.
Added the hint to ask for write access on roundup-devel.

Author: Bernhard Reiter

website/www/code.txt

@@ -24,6 +24,9 @@ The development branch can be checked out via::
 Read-write Access
 -----------------
 
-Developers may also make use of shared SSH keys for authentication::
+When attempting to write, you will be prompted for your SourceForge.net 
+username and password. (See `SF's site documentation on svn authorisation <http://sourceforge.net/apps/trac/sourceforge/wiki/Subversion#Authentication>`_)
+Of course a roundup developer must have granted
+you write access first - ask for it on the roundup-devel list.
 
   svn co https://svn.roundup-tracker.org/svnroot/roundup/roundup/trunk roundup