rfc3280 AttributeObjId list is not exhaustive

[Vanuan]

lib/spec/rfc3280.js contains a list of attributes OIDs. But there are other OIDs that are not present in this list, but are being used in SignerInfo. For example, authenticatedAttributes can be those:

signingCertificateV2 1.2.840.113549.1.9.16.2.47
contentType 1.2.840.113549.1.9.3
messageDigest 1.2.840.113549.1.9.4
signingTime 1.2.840.113549.1.9.5

http://tools.ietf.org/html/rfc5035#page-4

SigningCertificateV2 ::=  SEQUENCE {
    certs        SEQUENCE OF ESSCertIDv2,
    policies     SEQUENCE OF PolicyInformation OPTIONAL
}

http://tools.ietf.org/html/rfc2985#page-12

ContentType ::= OBJECT IDENTIFIER

http://tools.ietf.org/html/rfc2985#page-13

MessageDigest ::= OCTET STRING

SigningTime ::= Time -- imported from ISO/IEC 9594-8