manager: pitfalls: cap virtio check to min 40 for Parallels

It looks like Parallels forked NetKVM from Red Hat and changed the
versioning scheme, but kept the same driver name. So we skip the warning
for a floor of v40.

Signed-off-by: Jason A. Donenfeld <[email protected]>

Author: zx2c4

manager/pitfalls.go

@@ -82,9 +82,10 @@ func pitfallVirtioNetworkDriver() {
 		if err != nil {
 			return
 		}
+		const minimumPlausibleVersion = 40 << 48
 		const minimumGoodVersion = (100 << 48) | (85 << 32) | (104 << 16) | (20800 << 0)
 		version := (uint64(fixedInfo.FileVersionMS) << 32) | uint64(fixedInfo.FileVersionLS)
-		if version >= minimumGoodVersion {
+		if version >= minimumGoodVersion || version < minimumPlausibleVersion {
 			return
 		}
 		log.Println("Warning: the VirtIO network driver (NetKVM) is out of date and may cause known problems; please update to v100.85.104.20800 or later")