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. Gateways
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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