Apache ASN.1

The ASN.1 subproject attempts to isolate the ASN.1 libraries and tools for encoding ASN.1 in BER/DER/CER/PER encodings. The LDAP and X.500 aspects of the directory project impose the need for ASN.1 and BER codecs. Kerberos requires DER. Rather than implement highly specific and britle code for these needs we decided to separate out the APIs and implementations used for dealing with ASN.1 codecs for any ASN.1 defined protocol.