Cleanup and simply configure.in.
Cleanup and simply configure.in.

Apply more common style for AC_ARG_ENABLE parameters, drop
AC_CANONICAL_TARGET that is unnecessary for a non-compiler package, and
drop workarounds that seem to be there for very old autoconf versions.

fingunter/OpenCryptoki,joylatten/opencryptoki,shpedoikal/opencryptoki,joylatten/opencryptoki,shpedoikal/opencryptoki,joylatten/opencryptoki,fingunter/OpenCryptoki,joylatten/opencryptoki,joylatten/opencryptoki,shpedoikal/opencryptoki,fingunter/OpenCryptoki,shpedoikal/opencryptoki,fingunter/OpenCryptoki