Description:
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    When accessing url like :http://localhost/first/second/third/path
Built-in web server will try to find default index files:index.php/html,

1. if the index file didn't exist 
2. it will try to look it reversely:
3. try look it in third and second and first
if any dir have a index.php or index.html, it will be considered as found index 
file. this is the wrong behavior. if path is a dir, if index.php/html not found
it should be 404.


Test script:
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NONE

Expected result:
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index.php in web root without router
/not/found/path should be 404

Actual result:
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HTTP 200