7390labor/7490labor:
 * don't try to set/change tty settings while booting (=sysiniting), freetz launches sysinit-process without controlling tty
 * the patch from this commit actually reverts one of the AVM changes from the recent labor versions
 * TODO: not sure if this is the proper/final solution
 * refs #2518


git-svn-id: file:///var/svn/freetz/trunk@12298 149334a1-2f27-0410-a3b9-fc62619ac1e6