optimize: filter shortConnErr in tracer

[li-jin-gou]

What type of PR is this?

optimize

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• 在 trace 中过滤 shortConnErr 错误

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[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (0619701) 82.52% compared to head (5741078) 82.52%.

Files	Patch %	Lines
pkg/protocol/http1/server.go	50.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1037      +/-   ##
===========================================
- Coverage    82.52%   82.52%   -0.01%     
===========================================
  Files           98       98              
  Lines        10025    10029       +4     
===========================================
+ Hits          8273     8276       +3     
- Misses        1255     1257       +2     
+ Partials       497      496       -1     

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