Added missing #include <sys/types.h>
Added OPMOCK
Added test for Opmock. Works.
Corrected argument order in strncpy() call
Added necessary cast and comment
Added missing "const"
Added commentary
Added #include "ldm.h" for "prod_class_t"
Changed "prod_class" to "prod_class_t" to make Opmock happy
Initial and partial mocking of VCMTP C API & restructuring

Moved "vcmtp" directory under "multicast".
Got "make distclean" to work
Got "make distcheck" to work under gcc and c99