Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Repo copy libpthreads to libkse.This introduces the WITHOUT_LIBKSE nob,and changes WITHOUT_LIBPTHREADS to mean with neither threading libs.Approved by: re(kensmith)
Stylize. Introduce ppc_{get|set}_tp() and ppc_{get|set}_tcb() toabstract the magic that happens when deriving one or the other.
Implement TLS.
Bring PPC up to date with latest TLS changes.
PPC MD bits for KSE. Runs test cases OK. Crippled to 1:1 mode forthe time being.