Re: [libvirt] [PATCHv3 1/2] conf: add <listen> subelement to domain <graphics> element

Once it's plugged in, the <listen element will be an optional replacement for the "listen", "port", "tlsPort", and "autoport" attributes that graphics elements already have. If the <listen> type='address', it will have an attribute called 'address' which will contain an IP address or dns name that the guest's display server should listen on. If, however, type='network', the <listen> element should have an attribute called 'network' that will be set to the name of a network configuration to get the IP address from. * docs/schemas/domain.rng: updated to allow the <listen> element * docs/formatdomain.html.in: document the <listen> element and its attributes. * src/conf/domain_conf.[hc]: 1) The domain parser, formatter, and data structure are modified to support 0 or more <listen> subelements to each <graphics> element. The old style "legacy" attributes are also still accepted, and will be stored internally just as if they were a separate <listen> element. On output (i.e. format), the first <listen> element will be duplicated in the legacy attributes of the <graphic> element. 2) The following attributes have been removed from the unions in virDomainGRaphicsDef for graphics types vnc, rdp, and spice: listen port tlsPort autoport These attributes are all present in the <listen> subelement (aka virDomainGraphicsListenDef)