r.fill.stats manual: v.surf.bspline URL added

raster/r.fill.stats/r.fill.stats.html

@@ -57,6 +57,7 @@ extent.
 This module is not well suited for interpolating sparse input data and
 closing large gaps. For such purposes more appropriate
 methods are available, such as
+<em><a href="v.surf.bspline.html">v.surf.bspline</a></em>,
 <em><a href="v.surf.idw.html">v.surf.idw</a></em> or
 <em><a href="v.surf.rst.html">v.surf.rst</a></em>.
 
@@ -504,6 +505,7 @@ d.legend diff_orig_idw
 <a href="r.fillnulls.html">r.fillnulls</a>,
 <a href="r.neighbors.html">r.neighbors</a>,
 <a href="r.surf.idw.html">r.surf.idw</a>,
+<a href="v.surf.bspline.html">v.surf.bspline</a>,
 <a href="v.surf.idw.html">v.surf.idw</a>,
 <a href="v.surf.rst.html">v.surf.rst</a>
 </em>