Function verify_general_timeless 

fn verify_general_timeless(
    hashes: &DirectorySignaturesHashesAccu,
    signatures: &[NdiDirectorySignature],
    trusted: &[RsaIdentity],
    certs: &[&AuthCert],
    threshold: usize,
) -> Result<(), VF>

Meat of the verification functions for network documents

Checks that at least threshold members of trusted have signed this document (in signatures), via some cert(s) in certs.

Does not check validity time.