For enforcer worker threads we block all signals so that they are delivered to the main thread, some systems send signals to all and some just to a random thread. Added enforcer worker thread startup checking, if any thread fails to start up we exit.
For enforcer worker threads we block all signals so that they are delivered to the main thread, some systems send signals to all and some just to a random thread. Added enforcer worker thread startup checking, if any thread fails to start up we exit.

opendnssec/opendnssec-svn,opendnssec/opendnssec-svn,opendnssec/opendnssec-svn,opendnssec/opendnssec-svn