flight3: respect curves configuration

[Snawoot]

Description

As far as I understand Flight3 is pretty much like Flight1, but with Cookie. So I just reuse logic from Flight1 to ensure correct behaviour.

Reference issue

Fixes #587

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.13%. Comparing base (61b3466) to head (8bf6f8c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #588      +/-   ##
==========================================
+ Coverage   80.07%   80.13%   +0.05%     
==========================================
  Files         101      101              
  Lines        5330     5330              
==========================================
+ Hits         4268     4271       +3     
+ Misses        687      684       -3     
  Partials      375      375              

Flag	Coverage Δ
go	80.16% <100.00%> (+0.05%)	:arrow_up:
wasm	63.90% <100.00%> (ø)

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[at-wat]

Seems related to https://github.com/pion/dtls/pull/475 (@daenney FYI)

@Snawoot Could you add a test as well as flight1?

[Sean-Der]

I added a test, after CI passes will merge!