kernel 2.6.19: add knfsd fix, by olistudent/capt_bluebear (refs http://www.ip-phone-forum.de/showthread.php?t=235283&p=1907532, closes #1401) 

git-svn-id: file:///var/svn/freetz/trunk@10344 149334a1-2f27-0410-a3b9-fc62619ac1e6