Make idle connections configurable

[quambene]

Make idle connections configurable

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (177b840) 90.72% compared to head (9271a0a) 90.63%.

Files	Patch %	Lines
src/settings.rs	33.33%	4 Missing ⚠️
src/cmd/fetch.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
- Coverage   90.72%   90.63%   -0.09%     
==========================================
  Files          31       31              
  Lines        3988     4004      +16     
==========================================
+ Hits         3618     3629      +11     
- Misses        370      375       +5     

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