`TIdRequestHeaderInfo`
		Authentication
pl		Accept
pl		AcceptCharSet
pl		AcceptEncoding
pl		AcceptLanguage
pl		BasicAuthentication
pl		Host
pl		From
pl		Password
pl		Referer
pl		UserAgent
pl		Username
pl		ProxyConnection
pl		Range
pl		Ranges
pl		MethodOverride

`TIdEntityHeaderInfo`
	ro	OwnerComponent
	ro	HasContentLength
	ro	HasContentRange
	ro	HasContentRangeInstance
	ro	RawHeaders
pl		CacheControl
pl		CharSet
pl		Connection
pl		ContentDisposition
pl		ContentEncoding
pl		ContentLanguage
pl		ContentLength
pl		ContentRangeEnd
pl		ContentRangeStart
pl		ContentRangeInstanceLength
pl		ContentRangeUnits
pl		ContentType
pl		ContentVersion
pl		CustomHeaders
pl		Date
pl		ETag
pl		Expires
pl		LastModified
pl		Pragma
pl		TransferEncoding

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