netinterface.cpp: Fix assert in shutdown by calling the NetTracker constructor from the right thread
netinterface.cpp: Fix assert in shutdown by calling the NetTracker constructor from the right thread

git-svn-id: ced07d5e10f05f45759cb75bdadb6610d25656be@527 ac7a513c-5e3a-0410-af42-968c3ac6e7dc

orgads/iris,psi-im/iris,psi-im/iris,orgads/iris,orgads/iris,psi-im/iris,drizt/iris,harishnavnit/iris,harishnavnit/iris,tfar/iris-gsoc2010,tfar/iris-gsoc2010,drizt/iris,drizt/iris,harishnavnit/iris,tfar/iris-gsoc2010