we already differentiate between standard and non-standard names anyway
and don't detect and return the VMID in the latter case anyway. drop it
from the RE as well to allow names like 'vzdump-qemu-template.vma.lzo'
without the need for a fake VMID.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
28be2a431b