memset structs to zero
Print out name on end of loading server, too
Added preliminary unit test program

Which thinks it's "radiusd".  But, it never opens any sockets.
All it does is read a "packet" from a file, and dump the "reply"
to another file.
Better handler for --mode=execute

Everything after the "--mode=execute" are treated as options to the
command to be execute, and not jlibtool arguments, or arguments
that jlibtool gets excited about.
If installdir is "", don't install the program
Don't install unittest