tst.strchr.d.out revision 2633:71bab08d24b2 
1strchr("fooeyfooeyfoo", 'f') = "fooeyfooeyfoo"
2strrchr("fooeyfooeyfoo", 'f') = "foo"
3strchr("fooeyfooeyfoo", 'y') = "yfooeyfoo"
4strrchr("fooeyfooeyfoo", 'y') = "yfoo"
5strrchr("yfooeyfoo", 'y') = "yfoo"
6strchr("fooeyfooeyfoo", '') = ""
7strrchr("fooeyfooeyfoo", '') = ""
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