r.patch: link r.series from doc

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@70896 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.patch/main.c

@@ -60,6 +60,8 @@ int main(int argc, char *argv[])
     G_add_keyword(_("mosaicking"));
     G_add_keyword(_("merge"));
     G_add_keyword(_("patching"));
+    G_add_keyword(_("aggregation"));
+    G_add_keyword(_("series"));
     module->description =
 	_("Creates a composite raster map layer by using "
 	  "known category values from one (or more) map layer(s) "

raster/r.patch/r.patch.html

@@ -105,6 +105,13 @@ This would raise the hard limit to 1500 file. Be warned that more
 files open need more RAM. See also the Wiki page
 <a href="http://grasswiki.osgeo.org/wiki/Large_raster_data_processing">Hints for large raster data processing</a>.
 
+<p>
+Operating systems usually limit the length of the command line
+which limits the number of input raster maps user can pass to the module
+using the option <b>input</b>. In that case,
+<em><a href="r.series.html">r.series</a></em> can be used instead of
+<em>r.patch</em>.
+
 
 <h2>EXAMPLE</h2>
 
@@ -128,6 +135,7 @@ r.patch in=$MAPS out=mosaic
 <a href="g.rename.html">g.rename</a>,
 <a href="r.mapcalc.html">r.mapcalc</a>,
 <a href="r.support.html">r.support</a>,
+<a href="r.series.html">r.series</a>,
 <a href="v.mkgrid.html">v.mkgrid</a>
 </em>
 <p>