See also r3982 and ticket #429.

Reviewed by buntinas@.

[svn-r3763] Moved the network module directory structure to remove the unnecessary "_module" tag. Made similar appropriate changes to the function and datatype names as well. The newgm module is left alone, as it's not in the configuration path, and will probably be deleted. The wintcp module is not changed either, as the naming convention for it is different from the rest of the modules.

allocate and free memory correctly when dealing with PMI key/val lengths.

Reviewed by buntinas@.

significant additional functionality.  This change contains the infrastructure
for SMP collectives and an implementation of SMP-aware broadcast.

Reviewed by thakur@.