Add perl support to parse and DER encode ASN.1 OID specs

Add perl support to parse and DER encode ASN.1 OID specs

We have an old OID database that's not as readable as would be
desired, and we have spots with hand coded DER for well known OIDs.

The perl modules added here give enough support that we can parse
OBJECT IDENTIFIER definitions and encode them as DER.

OpenSSL::OID is a general OID parsing and encoding of ASN.1
definitions, and supports enough of the X.680 syntax to understand
what we find in RFCs and similar documents and produce the DER
encoding for them.

oids_to_c is a specialized module to convert the DER encoding from
OpenSSL::OID to C code.  This is primarily useful in file templates
that are processed with util/dofile.pl.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11450)