in.c: when an interface address is deleted, keep its multicast membership
. records (attached to a struct multi_kludge) for attachment to the
. next address on the same interface. Also, in_multi structures now
. gain a reference to the ifaddr so that they won't point off into
. freed memory if an interface goes away and doesn't come back before
. the last socket reference drops. This is analogous to how it is
. done for routes, and seems to make the most sense.
- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitialized data in
header files.
- Add a few prototypes.
- Clean up warnings resulting from the above.
NB: ioconf.c will still generate a redundant-declaration warning, which
is unavoidable unless somebody volunteers to make `config' smarter.
