Ability to add Root CAs.

[aandryashin]

related to #225

Usage:

For each cert.pem file set environment variable as follows:

ROOT_CA_<Cert Name>=$(cat cert.pem | base64 -w 0)

[codecov]

Codecov Report

Merging #322 (32b4765) into master (2542635) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #322   +/-   ##
======================================
  Coverage    6.40%   6.40%           
======================================
  Files           7       7           
  Lines         765     765           
======================================
  Hits           49      49           
  Misses        709     709           
  Partials        7       7           

Flag	Coverage Δ
go	6.40% <ø> (ø)

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