[quicwg/base-drafts] PLPMTUD section claims that PADDING frames generate ACKs (#1827)

[Andrew Macedonia <[e-mail]>]

Section 8.4.2. of the transport draft (Special Considerations for Packetization Layer PMTU Discovery) says:
"The PADDING frame provides a useful option for PMTU probe packets. PADDING frames generate acknowledgements, but they need not be delivered reliably."

Meanwhile Section 8.1. of the transport draft (Packet Processing and Acknowledgment) contains language suggesting that PADDING frames do not generate acknowledgements. Also I believe this was the conclusion reached in older issues about PADDING frames generating ACKs so Section 8.4.2 is in error.

It may also be helpful, in Section 8.4.2, to state that PING+PADDING is useful for PMTU probe packets, as that will generate an ACK while allowing the packet to be inflated to whatever size necessary.

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