* pthread_create: Fix an (unlikely) error in fallback value in the
event of a failure (which should never occur) (2015-07-23).
* include/, sched/, and libc/: Add support for sporadic scheduling parameters in struct sched_param, posix_spawnattr_t, and pthread_attr_t. Update all user interfaces to pass sporadic scheduling parameters. Feature is dependent on EXPERIMENTAL and no changes have yet been made to core scheduling logic (2015-07-23).
* include/, sched/, and libc/: Add support for sporadic scheduling
parameters in struct sched_param, posix_spawnattr_t, and pthread_attr_t.
Update all user interfaces to pass sporadic scheduling parameters.
Feature is dependent on EXPERIMENTAL and no changes have yet been
