Update URL for pgtclng project.

Thom Brown

Author: tglsfdc

doc/src/sgml/external-projects.sgml

@@ -113,7 +113,7 @@
       <entry>pgtclng</entry>
       <entry>Tcl</entry>
       <entry></entry>
-      <entry><ulink url="http://pgfoundry.org/projects/pgtclng/">http://pgfoundry.org/projects/pgtclng/</ulink></entry>
+      <entry><ulink url="http://sourceforge.net/projects/pgtclng/">http://sourceforge.net/projects/pgtclng/</ulink></entry>
      </row>
 
      <row>