Improve M3U8 request by performing head request

[Rakambda]

Pull Request Etiquette

Checklist

• Tests have been added in relevant areas
• Corresponding changes made to the documentation (README.adoc)

Type of change

Internal change

Description

Using head request will prevent the body from being downloaded requiring less network IO

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.66%. Comparing base (3dbbbce) to head (1a95d9c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #802   +/-   ##
==========================================
  Coverage      85.66%   85.66%           
  Complexity      1104     1104           
==========================================
  Files            200      200           
  Lines           3447     3447           
  Branches         260      260           
==========================================
  Hits            2953     2953           
  Misses           441      441           
  Partials          53       53           

Flag	Coverage Δ
unittests-miner	86.05% <100.00%> (ø)
unittests-viewer	58.33% <ø> (ø)

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