Standard 4.3.1.3.3. - Request File URL must be unique for every unique content

[hideki nara]

It's trivial.

But, because careless developer like me easily gets stuck in the mud, I think it is better to mention that. Because request files can be cached.

[John Bradley]

Update 4.1.1.3.3 to make it clear that different RPF files must have unique URL.

We did at one point include the hash of the file in the URL to stop the caching problem.

Add text.

[hideki nara]

Sounds nice. Thank you very much.

[John Bradley]

fixed