This is a rollback of a change list [1] that was an attempt to avoid a bug in usrsctp[2], but it wasn't very successful. But with the usrsctp bug fixed, we can revert to the desired state; that we bundle FORWARD-TSN with other control and data chunks in a SCTP packet. [1] https://webrtc-review.googlesource.com/c/src/+/229101 [2] https://github.com/sctplab/usrsctp/issues/597 Bug: webrtc:42223134 Change-Id: I2f3b511c91639e6b9516160190600beb0c04b5fa Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/361862 Reviewed-by: Florent Castelli <orphis@webrtc.org> Commit-Queue: Victor Boivie <boivie@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42976}