Overhaul stats: add a configuration option to enable/disable stats per server

[josecelano]

Add a configuration option to enable/disable stats per server. It does not have any effect yet.

[josecelano]

ACK 57d884d

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.00%. Comparing base (cce6b61) to head (57d884d).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/configuration/src/v2_0_0/http_tracker.rs	75.00%	1 Missing ⚠️
packages/configuration/src/v2_0_0/udp_tracker.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1402      +/-   ##
===========================================
- Coverage    82.00%   82.00%   -0.01%     
===========================================
  Files          232      232              
  Lines        17036    17046      +10     
  Branches     17036    17046      +10     
===========================================
+ Hits         13971    13978       +7     
- Misses        2821     2831      +10     
+ Partials       244      237       -7     

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