Rationalize CMSG_SPACE usage:

  in lib/zebra.h, ensure that RFC3542-required CMSG_SPACE and CMSG_LEN
  are defined.  Warn if alignment assumptions are made, since they are
  i386-centric.

  in lib/sockopt.h, declare that sockopt sizes are without
  CMSG_SPACE-required padding - just simple sizeof.

  in ospfd/ospf_packet.c, simply use CMSG_SPACE

This should remove all instances of CMSG_ALIGN from the source code.
This is a nonstandard, though rational, construct; quagga should use
only those defines in RFC3542.
diff --git a/ospfd/ChangeLog b/ospfd/ChangeLog
index b8f526e..11fb3b6 100644
--- a/ospfd/ChangeLog
+++ b/ospfd/ChangeLog
@@ -1,3 +1,8 @@
+2004-11-15  Greg Troxel  <gdt@fnord.ir.bbn.com>
+
+	* ospf_packet.c (ospf_recv_packet): Assume CMSG_SPACE is present
+	and works (lib/zebra.h provides if OS doesn't).
+
 2004-11-15 Paul Jakma <paul@dishone.st>
 
 	* ospf_{apiserver,te}.c: ospf_lsa_free's should be ospf_lsa_unlock.