Update link to OSGeo bugtracker in manpage

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@31460 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.in.mat/description.html

@@ -99,8 +99,8 @@ save -mat4-binary filename.mat map_*
 
 Robust support for mixed-Endian importation.
 <i>(This is a work in progress, please help by reporting any failures to the
-<a href="http://grass.itc.it/bugtracking/bugreport.html">
-GRASS bug tracking system</a>)</i>
+<a href="http://trac.osgeo.org/grass/">
+GRASS bug tracking system</a></i>; you will need to login with an OSGeo Userid)
 <br>
 Add support for importing map history, category information, color map, etc.
 if they exist.
@@ -108,7 +108,6 @@ if they exist.
 Option to import a version 5 MAT-File, with map and support information 
 stored in a single structured array.
 
-
 <h2>BUGS</h2>
 
 If you encounter any problems, please contact the GRASS Development Team.