Well, I have no clue how far eAthena is with their renewal branch so I can't help with that.
Here is a link where you can download the clients to use for diffing purposes, https://subversion.assembla.com/svn/weetools/clients/ that should help you on your way. I recommend you either use the 20110111 client or any other client between the 20110906 version. Also remember to compile your SVN when you make changes to your src, else they won't take effect!
Good luck.