hooks: distinguish between locally committed and incoming changes.

"commit" hook is now for locally committed changes only.
"incoming" is for changes pulled, pushed, or unbundled into local repo.

mercurial/localrepo.py

@@ -1386,7 +1386,7 b' class localrepository(object):'
                 return 1
 
             for i in range(cor + 1, cnr + 1):
-                self.hook("commit", node=hex(self.changelog.node(i)))
+                self.hook("incoming", node=hex(self.changelog.node(i)))
 
         return