Overhaul the display of certificate details in
the 'ca' utility. This can now be extensively
customised in the configuration file and handles
multibyte strings and extensions properly.

This is required when extensions copying from
certificate requests is supported: the user
must be able to view the extensions before
allowing a certificate to be issued.

Add support for X509_NAME_print_ex() in req.

Initial code for cutomizable X509 print routines.

This allows intermediate CAs to be created more easily.

PKCS12_create() now checks private key matches certificate.

Fix typo in x509 app.

Update docs.

New function ASN1_STRING_to_UTF8() converts any ASN1_STRING
type to UTF8.

Fixes to d2i_ASN1_OBJECT, ASN1_INTEGER_to_BN and a_strex.c

Document the new DN printing options.

Change a few names to be more meaningful.

Fix typos in CA.pl docs.

New ASN1_STRING_print_ex() and X509_NAME_print_ex()
functions. These are intended to be replacements
for the ancient ASN1_STRING_print() and X509_NAME_print()
functions.

The new functions support RFC2253 and various pretty
printing options. It is also possible to display
international characters if the terminal properly handles
UTF8 encoding (Linux seems to tolerate this if the
"unicode_start" script is run).

Still needs to be documented, integrated into other
utilities and extensively tested.