Constant name of the response header defining the length of the content
according to RFC 2616, Section 14.13 commons-httpclient will evaluate
this name case insensitive
Constant name of the response header defining the MIME type of the
content according to RFC 2616, Section 14.17 commons-httpclient will
evaluate this name case insensitive
Constant name of the response header defining the the transfer encoding
according to RFC 2616, Section 14.41 This field is important in the
context of the content length, since RFC 2616, Section 4.4.3 defines that
in case both are submitted, content length must be be ignored.