Default zero value pkgHandle breaks v1 compatibility when discovering VFs

[thediveo]

Bitten after upgrading from v1.3.1 to c05a276ed0e0 because of needing to deal with netkit network interfaces: LinkByName() uses the unexported and zero valued pkgHandle. Now this is of type Handle which contains an unexported field of type HandleOptions:

type HandleOptions struct {
	lookupByDump     bool
	collectVFInfo    bool
	retryInterrupted bool
}

Notice how collectVFInfo uses opt-in instead of backwards-compatible opt-out. As I hope you'll release in preferably short course a v1.3.2 or v.1.4.0 the current HEAD breaks the v1 contract of not breaking the API including semantics.

Can you please switch from incompatible opt-in to v1 API guarantee-preserving opt-out regarding collecting VF information? Thank you!