feature request : interval for stage1_norm

[firejuggler]

Hi.
In my recent search for good poly in the recent thread; I rerun some range with laxer stage 1 bound. The problem is that when I use the laxer parameters, I get the poly of the stringent parameters. Is there a way to get only the poly with the stage 1 norm between interval? And yes, I know it won't be faster for the -np1 stage, but for nps and npr, it will be.
Actually, I would make the same request for the second stage.

[firejuggler]

factoring 3787388118933512063249259173231597770049112435945032094640277541632460519045009491164974276597271170346757143570242916437315466248541421375702840232794402591
msieve151_gpu -np "stage1_norm=35e21 1300000,1700000"

R0: -1200480925920816481471564149337
R1: 202123672654751
A0: -15781355527871170759777275437569335720
A1: 8212759892514754498116793506418
A2: 18961407570712695105316055
A3: -11472259305039285426
A4: 2021254478958
A5: 1519020
skew 1976657.82, size 2.241e-015, alpha -6.223, combined = 1.809e-012 rroots = 3

and with
msieve151_gpu -np "stage1_norm=45e21 1300000,1700000"

R0: -1225072227424732623261716197665
R1: 615102599057603
A0: 585260067465057234021255771040601573572
A1: 591705570007262842398072910650028
A2: -255768863516227368952358395
A3: -48412138505848495252
A4: 12144757499628
A5: 1372560
skew 4545523.52, size 2.450e-015, alpha -7.444, combined = 1.859e-012 rroots = 5

[jasonp]

Easily done.