Remove extensions argument from various functions
because it is not needed with the new extension
code.

New function OCSP_cert_to_id() to convert a pair
of certificates into an OCSP_CERTID.

New simple OCSP HTTP function. This is rather primitive
but just about adequate to send OCSP requests and
parse the response.

Fix typo in CRL distribution points extension.

Fix ASN1 code so it adds a final null to constructed
strings.

Redo OCSP response printing. Remove duplicate or
obsolete code. Delete some redundant files.

from the print routines.

Reorganisation of OCSP code: initial print routines in ocsp_prn.c. Doesn't
work fully because OCSP extensions aren't reimplemented yet.

Implement some ASN1 functions needed to compile OCSP code.