1178476Sjbstrchr("fooeyfooeyfoo", 'f') = "fooeyfooeyfoo" 2178476Sjbstrrchr("fooeyfooeyfoo", 'f') = "foo" 3178476Sjbstrchr("fooeyfooeyfoo", 'y') = "yfooeyfoo" 4178476Sjbstrrchr("fooeyfooeyfoo", 'y') = "yfoo" 5178476Sjbstrrchr("yfooeyfoo", 'y') = "yfoo" 6178476Sjb 7