- Fix logic inversion bug of net.inet.tcp.rfc1323[*].
- Fix logic inversion bug of net.inet.tcp.rfc1323[*].

- Split netoptions_start() to netoptions_AF() and add afexists() check
  for each address family.

- Display a message only if the user sets a non-default value, and set
  a sysctl explicitly even if it is the default value.

Spotted by:	Pegasus Mc Cleaft[*]

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase