This is not pleasant to read (and much, much less pleasant to write!) but
sort of necessary in an open project. Right now it's quite hard to figure
out what is licensed how, which doesn't matter much to most people but can
suddenly become very important when people want to know what they're being
allowed to do.
I kept the notices as short as I could. As far as I could see, everything
without a clear license notice is LGPL v2.1 or later.
This is important to allow running independent servers on the same machine.
Moses server (in moses.py) will not look for a free port any more if the
port specified is not available.
