Imported from archive.

Imported from archive.

* command (command:reload), mudpy.py (DataFile.load, DataFile.save):
More work on data file reloading

* mudpy, mudpy.py (Universe.new): Moved more code out of the mudpy
executable into the mudpy.py Python module.
(Universe.__init__, command_halt, command_reload): Renamed the
reload_modules and terminate_world bools to reload_flag and
terminate_flag respectively.

* mudpy.conf (internal:limits), mudpy.py (DataFile.save):
Implemented a data file rotation/backup scheme, configurable through
the default_backup_count int facet.

* mudpy.conf (internal:network): Example recommended config binds
only to 127.0.0.1 initially, for added security.

* mudpy.py (daemonize): More work on daemonization.