refactoring of COMPILER_BASIC_OPTS

Initial attempt to detect SUN C compiler

Initial attempt to detect HP C compiler

adjust ICC_windows settings

fix VAR_STRIP

Initial attempt to support configure's --(dis|en)able-optimize
option to specify dis(activation) of compiler optimizations.

If option is specified, it will be honored independant of the

Initial attempt to support configure's --(dis|en)able-optimize
option to specify dis(activation) of compiler optimizations.

If option is specified, it will be honored independant of the
--(dis|en)able-debug option.

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Initial attempt to support configure's --(dis|en)able-warnings
option to specify dis(activation) of picky compiler warnings.

If option is specified, it will be honored independant of the

Initial attempt to support configure's --(dis|en)able-warnings
option to specify dis(activation) of picky compiler warnings.

If option is specified, it will be honored independant of the
--(dis|en)able-debug option.

If option is not specified, it will follow --(dis|en)able-debug
setting, whose default is disabled if not specified.

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