added Recv-Q/Send-Q output to netstat.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20819 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a basic infrastructure for a netstat command.
* Started a netstat command.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19560 a95241bf-73f2-0310-859d-f6bbb57e9c96