url: http/https

 
 4.1 ‘http’ and ‘https’
 ======================
 
 The ‘http’ scheme refers to the Hypertext Transfer Protocol.  The ‘url’
 library supports HTTP version 1.1, specified in RFC 2616.  Its default
 port is 80.
 
    The ‘https’ scheme is a secure version of ‘http’, with transmission
 via SSL.  It is defined in RFC 2069, and its default port is 443.  When
 using ‘https’, the ‘url’ library performs SSL encryption via the ‘ssl’
 library, by forcing the ‘ssl’ gateway method to be used.  SeeGateways
 in general.
 
  -- User Option: url-honor-refresh-requests
      If this option is non-‘nil’ (the default), the ‘url’ library honors
      the HTTP ‘Refresh’ header, which is used by servers to direct
      clients to reload documents from the same URL or a or different
      one.  If the value is ‘nil’, the ‘Refresh’ header is ignored; any
      other value means to ask the user on each request.
 

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