Fixed TWDT / deadlock in AsyncTCP when sending long responses

[mathieucarbou]

Hello @tbnobody, @schlimmchen,

I don't know if you remember this issue: #1705

(I was not able to comment on it).

Turns out the past days / weeks we were able to pinpoint why AsyncTCP was crashing (or dead-locking when the TWDT was not used), on long responses or long chunk responses.

There has been a lengthy discussion around this problem here: mathieucarbou/ESPAsyncWebServer#165

A fix was implemented and tested: (we could call that a workaround or patch though because the real fix would be to get rid of the current queue design)

• https://github.com/mathieucarbou/AsyncTCP (3.2.15)
• https://github.com/mathieucarbou/ESPAsyncWebServer ( 3.4.0)

There is also some perf tests available in my fork and in the discussion above.

[tbnobody]

Thanks for the hint!! Will include it in the next release.