* ripngd/ripngd.c: move setsockopt_so_recvbuf to lib.
* lib/sockopt.{c,h}: Add setsockopt_so_recvbuf, for ripd and ripngd.
* ripd/ripd.c: set receive buffer to a decent size, some systems
have low defaults. Problem noted and fix suggested by Stephan
Schweizer in [zebra 20967].
This one fixes "router xxx" node commands in vtysh. Don't get "unknown
command" error when entering "passive-interface eth0" command while
ospfd and ospf6d running etc.
http://hasso.linux.ee/zebra/ht-ifrmap-14042003.patch
Allows to extract.pl to pickup "route-map xxx in/out dev" commands for vtysh
(ripngd). As lib/if_rmap.[c|h] are used in ripngd only, I moved them to the
ripngd/ directory.
