Add option to have no header encoding

[meain]

Fixes #102

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 67.85714% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 51.74%. Comparing base (500bfa5) to head (990d2ad).

Files	Patch %	Lines
message.go	52.63%	9 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
- Coverage   52.49%   51.74%   -0.76%     
==========================================
  Files           7        7              
  Lines        1301     1293       -8     
==========================================
- Hits          683      669      -14     
- Misses        549      555       +6     
  Partials       69       69              

Flag	Coverage Δ
unittests	51.74% <67.85%> (-0.76%)	⬇️

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