Increase IdleTimeout for HTTP connections

[leszko]

fix #2638

[codecov]

Codecov Report

Merging #2639 (9547f70) into master (e1b25b2) will not change coverage.
The diff coverage is 0.00000%.

@@              Coverage Diff              @@
##              master       #2639   +/-   ##
=============================================
  Coverage   56.29696%   56.29696%           
=============================================
  Files             88          88           
  Lines          19033       19033           
=============================================
  Hits           10715       10715           
  Misses          7736        7736           
  Partials         582         582           

Impacted Files	Coverage Δ
server/rpc.go	72.02381% <0.00000%> (ø)

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Impacted Files	Coverage Δ
server/rpc.go	72.02381% <0.00000%> (ø)