Fixed route for subnet < net having different hops

Be networks N1 < N2 < N3 in subnet relation.
Static route for N1, N3 has next hop H1,
N2 has hop H2.
Route to N1 must not be removed as redundant to N3.
Otherwise, traffic to N1 would be routed to H2.

This is also observed if N3 is a default route.
v3.049

 - Fixed bad optimization that removed route to subnet.
   Be networks N1 < N2 < N3 in subnet relation.
   Static route for N1, N3 having next hop H1, N2 having next hop H2.
   Route to N1 must not be removed as redundant to N3.
   Otherwise, traffic to N1 would be routed to H2 by mistake.
   This must also be observed if N3 is a default route.