[FEATURE] add redacted request header to http.log.enabled output

[jeffreyaven]

Feature Description
Add redacted request header info to http.log.enabled output to assist in debugging

Example(s)

Show keys with redacted values, including Authorization redact values based upon characters, initially redact all values, e.g.:

{
"Authorization": "xxxxxx xxxxxxxxxxxxxxx",
"Content-Type": "xxxxxxxxxxxxx"
}

future iterations could support known innocuous header values like Content-Type, etc, e.g.

{
"Authorization": "xxxxxx xxxxxxxxxxxxxxx",
"Content-Type": "application/json"
}