[9fans] magic loopback

[erik quanstrom <quanstro@quanstro.net>]

/sys/src/9/boot/local.c:/configloopback contains a special hack to make
the venti configuration
	venti=tcp!127.1!venti
work.  but this code is only run if booting from a local fossil.  so,
if i boot from tcp or il, i have to fiddle around a bit before things
will work.  i'm not against putting a real ip address in the configuration,
but then when the dhcp server decides to hand out a different address,
fossil won't start.

what is the standard way of handling this situation?  is it reasonable
to suggest moving the loopback configuration into general network
setup?

- erik