Eagain inf loop

[pkittenis]

Continued from #190

[codecov]

Codecov Report

Merging #212 into master will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #212      +/-   ##
==========================================
+ Coverage   89.55%   89.63%   +0.08%     
==========================================
  Files          23       23              
  Lines        1675     1669       -6     
==========================================
- Hits         1500     1496       -4     
+ Misses        175      173       -2     

Impacted Files	Coverage Δ
pssh/clients/native/single.py	87.10% <100.00%> (+1.30%)	⬆️
pssh/clients/native/tunnel.py	88.06% <0.00%> (-3.41%)	⬇️
pssh/clients/miko/parallel.py	97.80% <0.00%> (-1.10%)	⬇️
pssh/clients/miko/single.py	94.44% <0.00%> (+1.85%)	⬆️

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