http 轮训报错：The HTTP header line [client-version0x0d] does not conform to RFC 7230 and has been ignored

[niejian]

Fixes #1033

Changes proposed in this pull request:

Check mailbox configuration when submitting. Contributor Guide

[codecov]

Codecov Report

Base: 27.91% // Head: 27.93% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (4e306f0) compared to base (97409b9).
Patch has no changes to coverable lines.

❗ Current head 4e306f0 differs from pull request most recent head b6d0e62. Consider uploading reports for the commit b6d0e62 to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1034      +/-   ##
=============================================
+ Coverage      27.91%   27.93%   +0.01%     
- Complexity       690      691       +1     
=============================================
  Files            241      241              
  Lines           5667     5667              
  Branches         513      513              
=============================================
+ Hits            1582     1583       +1     
+ Misses          3943     3942       -1     
  Partials         142      142              

Impacted Files	Coverage Δ
.../plugin/impl/ThreadPoolExecutorShutdownPlugin.java	68.75% <0.00%> (+3.12%)	⬆️

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