Signal Distractions

It took a bit longer to get the dual machine up and running again - it has two 500 MHz PIIIs and the hard drive is a bit older as well, so it took about two hours to update the source repository and get it compiled.

While waiting for the machine to complete its task, I had the time to look into some other known issues of our code, and clean the signaling code a bit. We are now able to handle signals with interrupts turned on, some minor bugs went away, and there is now support for sigsuspend() and sigpending() - nothing earth shaking, but definitely a step into the right direction.

There were some other distractions, so I played around with SMP only shortly - I am just sure now that it still doesn't work :-)
Shortly after the second CPU steps in, both CPUs seem to come to a halt. I don't know yet what's causing this, but it seems to be a single basic problem - let's just hope I don't waste too much time searching for it.