cubicweb #1954075 config: clarify base-url vs host vs interface settings [open]

The all-in-one.conf file has 3 settings for which the interactions are not clear:

  • base-url (in section WEB)
  • interface (in section WEB)
  • host (in section MAIN)

currently if host is specified and base-url is not, then base-url is constructed from host (and port if any). It seems likely that host could be removed altogether but this needs checking.

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