Bring back ASN1_seq_pack(), ASN1_seq_unpack(), ASN1_pack_string() and
ASN1_unpack_string() from the NO_ASN1_OLD purge; turns out that some Ruby
extensions still use them, unfortunately, so we need to give them some more
time to catch up on ``recent'' interfaces.

Riding on the libcrypto major bump.
Remove AES_bi_ige_encrypt() from libcrypto. This routine is supposed to use
two keys and four IVs to do much magic, is specified as such with test vectors,
but the implementation actually always uses the first key, and the test vectors
were computed with it, so they are wrong.

Fixing the code to match the intended specification would break
interoperability with existing code (assuming such code would exist), so it is
better to remove this interface, which is obviously too complex for mere
mortals if even its author can not implement it correctly.

Riding on the libcrypto major bump.