functions and macros.

This change has associated tags: LEVITTE_before_const and
LEVITTE_after_const.  Those will be removed when this change has been
properly reviewed.

Reinstate the check for invalid length BIT STRINGS,
which was effectively bypassed in the ASN1 changed.

More linker bloat reorganisation:

Split private key PEM and normal PEM handling. Private key
handling needs to link in stuff like PKCS#8.

Relocate the ASN1 *_dup() functions, to the relevant ASN1
modules using new macro IMPLEMENT_ASN1_DUP_FUNCTION. Previously
these were all in crypto/x509/x_all.c along with every ASN1
BIO/fp function which linked in *every* ASN1 function if
a single dup was used.

Move the authority key id ASN1 structure to a separate file.
This is used in the X509 routines and its previous location
linked in all the v3 extension code.

Also move ASN1_tag2bit to avoid linking in a_bytes.c which
is now largely obsolete.

So far under Linux stripped binary with single PEM_read_X509
is now 238K compared to 380K before these changes.

Fix ASN1 bug when decoding OTHER type.

Various S/MIME DSA related fixes.

(we don't have an ASN1_TEMPLATE to complain about at this stage,
so  errtt == NULL  should be OK)

combine in CHOICE options.

This was causing d2i_DSAPublicKey() to misbehave.

the errant field for more ASN1 error conditions.

change the way ASN1 modules are exported.

Still needs a bit of work for example the hack which a
dummy function prototype to avoid compilers warning about
multiple ;s.

Set correct type in ASN1_STRING for
INTEGER and ENUMERATED types.

Make ASN1_INTEGER_get() and ASN1_ENUMERATED_get()
return -1 for invalid type rather than 0 (which is
often valid). -1 may also be valid but this is less
likely.

Load OCSP error strings in ERR_load_crypto_strings().

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.

Rewrite PKCS#12 code and remove some of the old
horrible macros.

Fix two evil ASN1 bugs. Attempt to use 'ctx' when
NULL if input is indefinite length constructed
in asn1_check_tlen() and invalid pointer to ASN1_TYPE
when reusing existing structure (this took *ages* to
find because the new PKCS#12 code triggered it).

Win32 but it is getting there...

Update mkdef.pl to handle ASN1_ANY and fix headers.

Stop various VC++ warnings.

Include some fixes from "Peter 'Luna' Runestig"
<peter@runestig.com>

Remove external declaration for des_set_weak_key_flag:
it doesn't exist.

Merge from the ASN1 branch of new ASN1 code
to main trunk.

Lets see if the makes it to openssl-cvs :-)