Support 1.12.3 (build 6141)

At 2006/11/14 , Blizzard and The9 released 1.12.3.6141 client in China, I already pulled the 1.12.3 (build 6141) support to http://github.com/mangoszero, please view details here: https://github.com/mangoszero/server/pull/13 , would you please merge the change to https://github.com/cmangos/mangos-classic ?

I also uploaded the 1.12.3.6141 version of wow.exe to skydrive: http://sdrv.ms/Wp9IgF , hope it will be useful

Thank you : )