ompi_config.h in some of the intercept mechanisms.
* Intercept munmap when called directly by the user when we are using
ptmalloc2 (previously we only covered when the user called free()).
* Don't go through the locking and list traversal logic trying to fire
callbacks until there is actually a callback to fire. This is both
a performance boost and a way to cope with the hook callback being
triggered before opal_init.
This commit was SVN r6818.
c8865bd5c1