0.9.11.19:

0.9.11.19:
        Make the test suite pass on Solaris/x86.

        * Fix a number of bashisms in test/*.sh
	* :ENCAPSULATE NIL tracing:
          ... In the breakpoint handling internals use the signal context
              FP/PC directly to construct the frame, instead of walking through
              the backtrace until a matching frame is found.
          ... Kill the single-stepper remains in x86(-64)-arch.c. Turning
              on processor single-stepping with signal context frobbing
              was causing extra trace traps, and the code for handling those
              was presumably already lost a long time ago.
        * Floating point exception handling:
          ... Define os_context_fp_control, and use it instead of the stub
              implementation in x86-vm.lisp.
        * Mark the usual backtrace tests as expected to fail on this OS too