Clean up CHANGES for clarity

Changes with Apache 2.4.24

  *) core: New directive HttpProtocolOptions to control httpd enforcement

     of various RFC7230 requirements. [Stefan Fritsch, William Rowe]

  *) core: Permit unencoded ';' characters to appear in proxy requests and

     Location: response headers. Corresponds to modern browser behavior.

     [William Rowe]

  *) core: ap_rgetline_core now pulls from r->proto_input_filters.

  *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP

     conformance or to only log the found problems. [Stefan Fritsch]

  *) core: Correctly parse an IPv6 literal host specification in an absolute

     URL in the request line. [Stefan Fritsch]

  *) core: New directive RegisterHttpMethod for registering non-standard

     HTTP methods. [Stefan Fritsch]

  *) core: New directive HttpProtocol which allows to disable HTTP/0.9

     support. [Stefan Fritsch]

  *) mod_http2: unannounced and multiple interim responses (status code < 200)

     are parsed and forwarded to client until a final response arrives.

     [Stefan Eissing]