Make sieve2357::prime_t sortable with key q
Make sieve2357::prime_t sortable with key q

sieve2357::sieve requires them in order of increasing q

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs