add a small helper to test if GW is the same between 2 routes
fix subnet_is_superior so that in case ip1 = ip2,
smaller mask is prefered
add regtest for mask-aware subnet sorting
add tests files for regtest
a new regtest for simplifying route files
the GW in the ref files are different so the simplification is not trivial
FIX simplify_route_file
now it takes the gateway into account correctly
at the cost of increased complexity O(n^2) instead of O( n x log (n) )