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Recently, pacing support was added for cubic congestion algorithm. This was activated by using the new token "cubic-pacing" on quic-cc-algo. Furthermore, it was possible to define a burst size with a new parameters after congestion token between parenthesis. This configuration is not oblivious to users. In particular, it can cause to easily forgot to tweak burst size, which can dramatically impact performance. Simplify this by removing the extra "-pacing" suffix. Now, pacing will be activated solely based on the burst parameter. If 0, burst is considered as infinite and no pacing will be used. Pacing will be activating for any positive burst. This better reflects the link between pacing and burst and its importance. Note that for the moment, if burst is specified, it will be ignored with a warning for algorithm outside of cubic. This is not a breaking change as pacing support was implemented in the current dev version.
