Synopsis
		sfdip2 < in.rsf > out.rsf mask=mask.rsf idip=idip0.rsf niter=5 liter=20 rect1=1 rect2=1 p0=0. order=1 nj1=1 verb=n pmin=-FLT_MAX pmax=+FLT_MAX

Parameters
		string idip= initial in-line dip (auxiliary input file name)   int liter=20 number of linear iterations   string mask= auxiliary input file name   int niter=5 number of iterations   int nj1=1 antialiasing   int order=1 accuracy order   float p0=0. initial dip   float pmax=+FLT_MAX maximum dip   float pmin=-FLT_MAX minimum dip   int rect1=1 dip smoothness on 1st axis   int rect2=1 dip smoothness on 2nd axis   bool verb=n [y/n] verbosity flag