> A related issue:
> 
> Dynamically changing the host address will have little impact on many
> programs, but some long-running client software may keep addresses for
> extended periods of time.  It would be nice to have a mechanism to
> warn long-running apps that the host address set is changing.

There is an internet draft being written that will propose such a thing
for IPv6 (and IPv4).  This is needed for renumbering...
-- 
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt.html
Westford, MA              Disclaimer: I disavow all knowledge of this message