Update chunk-reconfig to RFC 6525

[philipch07]

Description

updates and completes TODOs in chunk_reconfig.go according to RFC 6525.

Reference issue

n/a

[codecov]

Codecov Report

❌ Patch coverage is 60.86957% with 27 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.52%. Comparing base (9ee8305) to head (d4bc0d0).

Files with missing lines	Patch %	Lines
chunk_reconfig.go	64.91%	16 Missing and 4 partials ⚠️
association.go	41.66%	4 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #432      +/-   ##
==========================================
- Coverage   83.90%   83.52%   -0.38%     
==========================================
  Files          51       51              
  Lines        3448     3484      +36     
==========================================
+ Hits         2893     2910      +17     
- Misses        416      432      +16     
- Partials      139      142       +3     

Flag	Coverage Δ
go	83.52% <60.86%> (-0.38%)	⬇️

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