This patch updates the documentation to follow the change from route to route static.
The network-route manpage is now a generical one wich just list which types of routes we support like static or later dynamic.
In the network-route-static are the explanation for static routes.
This documents represents the previous network-route manpage .
Signed-off-by: Jonatan Schlag <jonatan.schlag@ipfire.org> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>