message: Ensure LF line returns are used in construction of TBS
diff: @@ -125,9 +125,8 @@ url=/${url#*/} # Remove domain name, restore leading slash
  url=${url%\#*} # Remove fragment
  # Construct string to sign
  -string_to_sign="(request-target): ${command,,} ${url}
  -digest: SHA-256=$req_digest
  -content-length: $content_length"
  +newline=$'\n'
  +string_to_sign="(request-target): ${command,,} ${url}${newline}digest: SHA-256=${req_digest}${newline}content-length: ${content_length}"
  # https://tools.ietf.org/html/draft-cavage-http-signatures-12#appendix-E.2
  signature_algorithm="hs2019"
  