[quicwg/base-drafts] Change design and and FIN to flow control (#730)

[Subodh Iyengar <[e-mail]>]

This PR has 1 editorial change and 2 design changes to flow control:

* [editorial] Clarifies the language around stream and connection flow control and makes it match the flow control section. 

* [design] Defines flow control in terms of offsets instead of max data. This means something different, because previously, maxData = 10 indicated that you could only send offset till 9, however with the change, sending maxOffset = 10 means that you can send offset until 10, i.e. 11 bytes. We could alternatively change the language of maxOffset to be MUST be LESS than instead of MUST NOT EXCEED to match maximumData.

* [design]  Makes FIN bit to be flow controllable. This would reduce one edge case where a packet scheduler does not have to do a special check for whether it only needs to send a FIN when it checks for flow control. This has the advantage of being able to define flow control on a stream in terms of offsets rather than max data.
You can view, comment on, or merge this pull request online at:

  https://github.com/quicwg/base-drafts/pull/730

-- Commit Summary --

  * Clarify and and FIN to flow control

-- File Changes --

    M draft-ietf-quic-transport.md (31)

-- Patch Links --

https://github.com/quicwg/base-drafts/pull/730.patch
https://github.com/quicwg/base-drafts/pull/730.diff

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