Add {enter,leave}_blocking_section to the hooks.
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Changes in libmojave/cutil:
+4 -1 lm_dll.c
+2 -0 lm_dll.h
+4 -0 lm_dll_hooks.h
A hyperlinked version of this commit is available at
http://svn.metaprl.org/commitlogs/libmojave/2008-05.html#08/05/23.13:44:12