To: None <current@sun-lamp.CS.Berkeley.EDU>
From: Chris G. Demetriou <cgd@nobozo.CS.Berkeley.EDU>
List: current
Date: 12/05/1993 22:55:09
we've just added multicast support to the kernel.  use
"options MULTICAST" to enable it.

a warning:
the values of the constants passed to the [gs]etsockopt syscalls
have changed.  I don't know why they were changed, but LBL and CSRG
are responsible for it, and, in the long run, it'll definitely
reduce *our* headaches to do it this way.

it presents a bit of a bootstrapping problem; your networking
applications might stop working and/or start whining.

until you've compiled new binaries, define COMPAT_OLDSOCKOPT as an
option to your kernel.  (DO NOT define MULTICAST as an option
until you've got new binaries set up...)

the COMPAT_OLDSOCKOPT option will go away in "a bit" -- where
a bit is probably no longer than 2 weeks...  not defining it shouldn't
cause *serious* problems if you've got old binaries, but i won't
stake my life on it...