net/mcast-tools & net/pim6dd: redefinition of struct igmpmsg

[Thomas Klausner <wiz%netbsd.org@localhost>]

Hi!

net/mcast-tools and net/pim6dd both fail with this error on NetBSD 11:

In file included from defs.h:128,
                 from mld6.c:71:
pimdd.h:542:8: error: redefinition of 'struct igmpmsg'
  542 | struct igmpmsg {
      |        ^~~~~~~
In file included from defs.h:101:
/usr/include/netinet/ip_mroute.h:218:8: note: originally defined here
  218 | struct igmpmsg {
      |        ^~~~~~~
*** Error code 1

mcast-tools is from 2006, and pim6dd is from 2003.

Is anyone interested in fixing them? Otherwise I suggest removing them.
 Thomas