test websockify with basic threading

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@24009 4046b530-fbad-4e16-af16-ee11f0b55167
Allow only one websockify connection, non blocking accept and no fork

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@24010 4046b530-fbad-4e16-af16-ee11f0b55167
With select blocking socket dont need to be unblocked

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@24012 4046b530-fbad-4e16-af16-ee11f0b55167
set isItTimetoYield dispatchException to default in dix_main

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@24014 4046b530-fbad-4e16-af16-ee11f0b55167