docs: Expand documentation about D-Bus GUIDs
Clarify that the terms ‘GUID’ and ‘UUID’ are used interchangeably in the context of D-Bus, and that neither of them are an RFC 4122 UUID.
Signed-off-by: Philip Withnall pwithnall@endlessos.org
(was originally “gdbus: Change terminology to use UUID rather than GUID”)
Edited by Philip Withnall