Fix remaining major bugs and UX issues

[nhooyr]

No description provided.

[codecov]

Codecov Report

Merging #56 into master will decrease coverage by 1.33%.
The diff coverage is 78.26%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
- Coverage   77.71%   76.37%   -1.34%     
==========================================
  Files          11       11              
  Lines         682      707      +25     
==========================================
+ Hits          530      540      +10     
- Misses        126      137      +11     
- Partials       26       30       +4

Impacted Files	Coverage Δ
accept.go	87.23% <100%> (ø)	⬆️
header.go	94.28% <100%> (-0.16%)	⬇️
statuscode.go	88.88% <100%> (+0.65%)	⬆️
json.go	52.94% <60%> (-3.31%)	⬇️
websocket.go	77.51% <77.59%> (-2.49%)	⬇️

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