r.univar manual: clearly mention r.stats.quantile

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@69766 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.univar/r.univar.html

@@ -32,6 +32,9 @@ This module can use large amounts of system memory when the <b>-e</b>
 extended statistics flag is used with a very large region setting. If the
 region is too large the module should exit gracefully with a memory allocation
 error. Basic statistics can be calculated using any size input region.
+Extended statistics can be calculated using
+<em><a href="r.stats.quantile.html">r.stats.quantile</a></em>.
+
 <p>
 Without a <b>zones</b> input raster, the <em>r.quantile</em> module will
 be significantly more efficient for calculating percentiles with large maps.