The 'xmlrpc'-based configuration parameters have been a misnomer since
the introduction of the generic HTTP service, years ago.
Hide these options from the server parameters, and replace them with
more appropriate 'http' ones:
--xmlrpc-interface -> --http-interface
--xmlrpc-port -> --http-port
--no-xmlrpc -> --no-http
The config entries for these have been adapted as well.
The old parameter names are still silently supported in both
command-line arguments and config files. However they are
stored with the new names in the `tools.config` dict,
and when saving config files (with the -s option).
Also clarified and cleaned up the descriptions of the HTTP/WEB server
parameters.
And finally, added a short version `-p`, for the `--http-port` option.
Credits to @dreispt for this (via #19518)
Closes#19518Closes#19778
Olivier Dony
e58e0c268c