* Improved router error messages and move some of the checking out of qswnal

*   Improved router error messages and move some of the checking out of qswnal
    and socknal and into the router itself.

*   Don't force FMR unmap on error if it wasn't mapped in the first place.

*   Make socknal close the incoming connection if it receives junk for
    forwarding

*   allow "lctl network down" == "lctl network unconfigure" (I kept wanting to
    type 'down' and now I can :)