Add support for X509_NAME_print_ex() in req.

Initial code for cutomizable X509 print routines.

like Malloc, Realloc and especially Free conflict with already existing names
on some operating systems or other packages.  That is reason enough to change
the names of the OpenSSL memory allocation macros to something that has a
better chance of being unique, like prepending them with OPENSSL_.

This change includes all the name changes needed throughout all C files.

certificate: currently this includes trust settings
and a "friendly name".

tolerated in certificates.

used by things like Xenroll. Also include documentation for extendedKeyUsage
extension.

Submitted by: Martin Kraemer <Martin.Kraemer@MchP.Siemens.De>

Submitted by:
Reviewed by:
PR:

include an 'indent' option to V3 stuff.

the main library, but only with printing at present. To see this try:
openssl x509 -in cert.pem -text
on a certificate with some extensions in it.

GeneralizedTime.

GeneralizedTime. At several points PKIX specifies that GeneralizedTime can be
used but OpenSSL doesn't currently support it. This patch adds several files
and a bunch of functions.

Of interest is the ASN1_TIME structure and its related functions. At several
points certificates, CRLs et al specify that a time can be expressed as a
choice of UTCTime and GeneralizedTime. Currently OpenSSL interprets this
(wrongly) as UTCTime because GeneralizedTime isn't supported. The ASN1_TIME
stuff provides this functionality.

Still todo is to trace which cert and CRL points need an ASN1_TIME and modify
the utilities appropriately and of course fix all the bugs.

Note new OpenSSL copyright in the new file a_time.c. I didn't put it in
a_gentm.c because it is a minimally modified form a_utctm.c .

Since this adds new files and error codes you will need to do a 'make errors'
at the top level to add the new codes.

handling to x509.c