[libvirt] number of graphic device in vm xml is limited to only 1

Hello, In qemu_command, vnc graphic device can’t be more than 1, as the following code show in qemuBuildCommandLineValidate(): If（sdl > 1 || vnc > 1 || spice > 1） { virReportError(….); return -1; } This check originally introduced by commit: 6fe9025eb. Qemu: Error on unsupported graphics config qemu can support multi-vnc-configuration in qemu process, but libvirt limit vnc graphics in only 1. Is there any considerations in libvirt? can remove this restriction? ------------------------------------------------------------------------------------------------------------------------------------- 本邮件及其附件含有新华三集团的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from New H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!