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+lockfile API
+============
+
+Talk about <lockfile.c>, things like:
+
+* lockfile lifetime -- atexit(3) looks at them, do not put them on the
+ stack;
+* hold_lock_file_for_update()
+* commit_lock_file()
+* rollback_rock_file()
+
+(JC, Dscho, Shawn)