add support for remaining mach dependencies in libdispatch and launchd
conditionally remove functionally I believe to be deprecated
add random OS X functionality needed by launchd - largely stubbed out
compile in support/, put apple headers first
rusage_info_v1 is now defined, add malloc_size
ifdef out 'legacy' functionality and add search_set_flags definition
add / update sundry apple headers
 make mach_msg_type_name_t type compatible with its usage
add pthread_mach_thread_np and remove redundant spawnattr definitions
make sure machine soft link gets removed
define all clock types
fix libdispatch build with re-ordered includes
make pthread_mach_thread_np compatible with libdispatchusage
update to track functions that are no longer missing symbols but are stubs or untrusted