hide IOErrors when remote closes the connection

[pfitzseb]

because these aren't actionable anyways.

Fixes #392.

[tanmaykm]

Should it be logged at @debug or @info level instead of completely ignoring? I believe servers like nginx do log a "upstream prematurely closed connection" when this happens. May be there are situations when it would be useful to know that this happened at the server?

[codecov-commenter]

Codecov Report

Merging #727 (a58b5c6) into master (6e0a60b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #727   +/-   ##
=======================================
  Coverage   76.87%   76.88%           
=======================================
  Files          37       37           
  Lines        2443     2444    +1     
=======================================
+ Hits         1878     1879    +1     
  Misses        565      565           

Impacted Files	Coverage Δ
src/Servers.jl	86.33% <100.00%> (+0.08%)	⬆️

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[pfitzseb]

Makes sense.

[fredrikekre]

LGTM, add a note in the changelog?

[pfitzseb]

Wanna tag a new patch release, @fredrikekre? :)

[fredrikekre]

Was already working on it: #729