Send improvements to ak@muc.de

- More on multicasting
- A man page for arp (for the sysctls and ioctls)
- Documentation for the ipv4/conf/ and ipv4/neigh/ sysctls
- netlink (incomplete), rtnetlink (not finished)
- transparent proxy
- The /proc/net files
- Martin Mares' ip autoconfig support
- IPX, IPv6, the amateur radio protocols, bridging and
  the wanrouter (I only concentrated on IPv4 and the generic socket layer).
  IPv6 is highest on the priority list, IPX and AX.25 are somewhere very low.
  Contributions are welcome!
  I don't know much about AX.25/ROSE/NetROM thus someone else has to do 
  the work here.

Random notes:
Should define interface index. 

EAGAIN for MSG_ERRQUEUE to stop

Token bucket filter description needed.

