Add 405 allow header. solves #2397

[mcserra]

No description provided.

[codecov]

Codecov Report

Merging #2404 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2404   +/-   ##
=======================================
  Coverage   98.72%   98.72%           
=======================================
  Files          41       41           
  Lines        2348     2350    +2     
=======================================
+ Hits         2318     2320    +2     
  Misses         17       17           
  Partials       13       13           

Impacted Files	Coverage Δ
gin.go	99.15% <100.00%> (+<0.01%)	⬆️

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[appleboy]

closed via #3759