New export to register/transfer/renew/revoke domains using Net::DRI.

Currently optimized for OpenSRS.  Should become more generalized in later
releases.  Modified Makefile to insert the Freeside log folder into the new
export.  Modified svc_domain.pm to prevent generation of transfer requests
when a domain is moved to a different package with a domain registration
attached to one of the included services.  Modified domreg.cgi to display
errors on a separate page.