[squid-dev] [RFC] deprecating ICP protocol

[Amos Jeffries]

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I would like to deprecate ICP protocol from a first-class citizen to a
second-class. Swapping it for HTCP as the default peer exchange
protocol for Squid-3.6.

ICP protocol was designed for use in HTTP/1.0 and works well for that.
However Squid and most servers are now HTTP/1.1 software.

ICP is not able to produce accurate results for the increasingly
popular HTTP/1.1 Vary objects. It will also have difficulty with
Store-ID adapted objects where header fields (Vary and others) are
used by the Store-ID helper.

Amos
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