Fixed the gallery and tutorial sections in introduction (#3163).

git-svn-id: http://svn.osgeo.org/mapserver/branches/branch-6-0@12521 7532c77e-422f-0410-93f4-f0b67bdd69e2

en/introduction.txt

@@ -869,16 +869,15 @@ tracker <http://trac.osgeo.org/mapserver>`__.
 Gallery
 ...............................................................................
 
-See `examples <http://gallery.osgeo.org>`__ of 
+See `examples <http://gallery.osgeo.org>`__ (*currently shut down*) of
 existing MapServer applications.
 
 Tutorial
 ...............................................................................
 
 Perry Nacionales built a great `Tutorial
-<http://hypnos.cbs.umn.edu/tutorial/>`__ on how to build a MapServer
-application.  You are invited to extend the collection of examples if
-you see cases that are missing.
+<http://biometry.gis.umn.edu/tutorial/>`__ on how to build a MapServer
+application (Mapserver version 5).
 
 Test Suite 
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