Class BootstrapServer is the main entry point for the bootstrap server
implementation. The BootstrapServer makes all object references
defined in a configurable file available using the old
naming bootstrap protocol.
Main startup routine for the bootstrap server.
It first determines the port on which to listen, checks that the
specified file is available, and then creates the resolver
that will be used to service the requests in the
args - the command-line arguments to the main program.