- Mark unused parameters __unused in handler
- Call sigqueue with getpid() instead of 0 -- the latter idiom appears to only
be valid on NetBSD

In collaboration with: pho
Sponsored by: EMC / Isilon Storage Division
Add limits.h #include for LINE_MAX

Sponsored by: EMC / Isilon Storage Division
Add sys/socket.h #include for struct sockaddr_in

Sponsored by: EMC / Isilon Storage Division