changes in sbcl-2.2.10 relative to sbcl-2.2.9:

  * platform support:
    ** win32: improved handling of stack overflow exceptions.  (lp#1302866)
    ** Mac OS X: enforce stronger alignment when building the runtime.
       (lp#1991485, reported by Yan)
    ** arm64: support for building the system without the sb-unicode feature
       (i.e. with 8-bit characters) is restored.
  * bug fix: do not elide the GC store barrier in closures.  (lp#1982608,
    reported by Andrew Berkley)
  * bug fix: make sb-introspect tests pass when the system is built without
    support for source locations.  (lp#1635349, reported by Tomas Hlavaty)
  * bug fix: erroneous assumption that the format-control of a simple condition
    was a string.  (lp#1803727)
  * bug fix: compiler consistency failure in modular arithmetic widening.
    (lp#1990715)
  * bug fix: provide a stub for a helper function (lp#1992316)
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