From Gerri:

Add missing file


git-svn-id: http://root.cern.ch/svn/root/trunk@29140 27541ba8-7e3a-0410-8455-c3a389f83636

etc/plugins/TDataSetManager/P010_TDataSetManagerFile.C

+void P010_TDataSetManagerFile()
+{
+   gPluginMgr->AddHandler("TDataSetManager", "^file", "TDataSetManagerFile", "Proof",
+                          "TDataSetManagerFile(const char *,const char *,const char *)");
+}