TPE Document, S2.3 P1

Pursuant to my F2F comment. The current first paragraph of section 2.3
reads:

> HTTP [HTTP11] uses the term user agent to refer to any of the various
> client programs capable of initiating HTTP requests, including
> browsers, spiders (web-based robots), command-line tools, native
> applications, and mobile apps. Although the protocol defined by this
> specification is applicable to all forms of user agent, the
> compliance requirements are specifically concerned with the privacy
> expectations of a human user and the tracking of their browsing
> history over time. Hence, user agents that do not have some form of
> "browsing" nature or do not communicate with more than one site are
> not expected to comply with this protocol.

This leaves the status of mobile apps somewhat unclear. I propose the
following text instead:


> HTTP [HTTP11] uses the term user agent to refer to any of the various
> client programs capable of initiating HTTP requests, including
> browsers, spiders (web-based robots), command-line tools, native
> applications, and mobile apps. Although the protocol defined by this
> specification is potentially applicable to all forms of user agent,
> the compliance requirements are specifically concerned with the
> privacy expectations of a human user and the tracking of their
> browsing history over time.
>
> There exist user agents which do not have a "browsing" nature, such
> as mobile apps which communicate with one service exclusively. These
> non-browsing user-agents are not the target for this standard, though
> there is no reason why they could not implement it.