0.9.13.22:

0.9.13.22:
	Implement SB-THREAD mutexes and waitqueues using only pthread
        functionality on platforms that don't support Linux futexes. New
        platforms that can be compiled with SB-THREAD:

          * Solaris/x86 (seems to be as stable as SBCL threads on Linux)
          * OS X/x86 (some known stability problems, but doesn't fail on the
            thread regression tests every time)
          * FreeBSD/x86 (reportedly "flat-out broken", tends to cause
            kernel panics)

        While I (Juho) am doing the final merge from lutex-branch to
        HEAD, much of the work was done by Cyrus Harmon, based on an
        initial implementation by Nathan Froyd. The Solaris work was
        funded by Tellme Networks, Inc.