Add 'local' tags

Add 'local' tags

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Add 'local' tags

Local tags are repository-private tags that override the usual tags.
They're not version controlled.

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--- a/mercurial/hg.py	Thu Jun 23 17:51:03 2005 -0800
+++ b/mercurial/hg.py	Thu Jun 23 18:48:50 2005 -0800
@@ -394,6 +394,9 @@
                             n, k = l.split(" ", 1)
                             self.tagscache[k.strip()] = bin(n)
             except KeyError: pass
+            for k, n in self.ui.configitems("tags"):
+                self.tagscache[k] = bin(n)
+                
             self.tagscache['tip'] = self.changelog.tip()
 
         return self.tagscache