Well, I'm stuck with a commute.  I alternate between staying at a friend's
house (fixed IP address, gateway, and DNS, and a hostname in his domain)
and being at a meeting (dhcp, no hostname, needs proxies).

It would be really nice if there were a way to have the system pick a strategy
on boot.

Proposal:  'etcswitch'.  There would be directories /etc/switch/foo, and
during boot, if 'etcswitch' is enabled, *before* normal config files are
read, you get a little prompt on /etc/switch/*, letting you pick a
configuration.  (Before it nukes your old files, it presumably copies them,
and you might have a few special ones like /etc/switch/previous.)

Is this a good idea?  A bad idea?

-s