r.fill.dir: more keywords

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@69299 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.fill.dir/main.c

@@ -85,6 +85,9 @@ int main(int argc, char **argv)
     module = G_define_module();
     G_add_keyword(_("raster"));
     G_add_keyword(_("hydrology"));
+    G_add_keyword(_("sink"));
+    G_add_keyword(_("fill sinks"));
+    G_add_keyword(_("depressions"));
     module->description =
 	_("Filters and generates a depressionless elevation map and a "
 	  "flow direction map from a given elevation raster map.");