Doc: replace reference to 'protocolConfig'
Doc: make it clear that 'protocols' must be called after 'inject'
Enabled use of multiple matcher groups in http header checks, close #2074
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Merge pull request #2078 from teads/dumpedfilespadding

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Merge pull request #2075 from krisgeus/master

Enabled use of multiple matcher groups in http header checks, close #207...
Minor clean up
configurable responseBodiesFolder
expose responseBody
dump response bodies (disabled by default)
RawFileBody & ELFileBody can be used for checks
more specific file extractors for bodies
perform raw response body check when requested
support base64-encoded content text (HAR 1.2)