default_algorithms option in ENGINE config.

Initial ENGINE config module, docs to follow.

Fix buffer overrun errors in OPENSSL_conf().

Experimental configuration code.

Incomplete, largely untested and subject to change/deletion.

perl util/mkerr.pl -recurse -write -rebuild

Modify apps to use NCONF code instead of old CONF code.

Add new extension functions which work with NCONF.

Tidy up extension config routines and remove redundant code.

Fix NCONF_get_number().

Todo: more testing of apps to see they still work...

really see why we need to define these function pointers with MS_FAR
if it's not done cosistently everywhere.

If we decide to support MS_FAR modifiers, it's better to have the
named something more unique for OpenSSL and to define them in e_os2.h.

sure they are available in opensslconf.h, by giving them names starting
with "OPENSSL_" to avoid conflicts with other packages and by making
sure e_os2.h will cover all platform-specific cases together with
opensslconf.h.

I've checked fairly well that nothing breaks with this (apart from
external software that will adapt if they have used something like
NO_KRB5), but I can't guarantee it completely, so a review of this
change would be a good thing.

pointers at the end of the structure.

by providing a function pointer that is given a name instead of a BIO.
For example, this could be used to load configuration data from an
LDAP server.

NCONF_get_number_e() is defined (_e for "error checking") and is
promoted strongly.  The old NCONF_get_number is kept around for
binary backward compatibility.

Actually, it's a feature that it goes looking at environment
variables.  It's just a pity that it's at the cost of the error
checking...  I'll see if I can come up with a better interface for
this.

After some messing around this seems to work but needs
a few more tests. Working out the syntax for sk_set_cmp_func()
(cast it to a function that itself returns a function pointer)
was painful :-(

Needs some testing to see what other compilers think of this
syntax.

Also needs similar stuff for ASN1_SET_OF etc etc.

libeay.num and ssleay.num.

There's no trace of it being implemented and it doesn't seem to have been
intended given that it is prototyped with a BIO yet there was a BIO-
specific version added in at the same time.

"Jan Mikkelsen" <janm@transactionsite.com> correctly states that the
OpenSSL header files have #include's and extern "C"'s in an incorrect
order.  Thusly fixed.

the result.

I have retained the old behavior of the CONF_* functions, and have
added a more "object oriented" interface through NCONF_* functions
(New CONF, you see :-)), working the same way as, for example, the
BIO interface.  Really, the CONF_* are rewritten so they use the
NCONF_* functions internally.

In addition to that, I've split the old conf.c code into two files,
conf_def.c and conf_api.c.  conf_def.c contains the default config
object that reads a configuration file the standard OpenSSL way, as
well as configuration file with Win32 registry file syntax (I'm not
sure I got that one right).  conf_api.c provides an API to build other
configuration file readers around (can you see a configuraion file in
XML?  I can :-)).

Finally, I've changed the name conf_lcl.h to conf_def.h, since it's
made specifically for that "class" and none others.

Update docs, change 'ca' to use the new callback parameter. Now moved key_callback
into app.c because some other utilities will use it soon.

seemed like a good idea at the time... several hours later it was rather
obvious that these are used all over the place making the changes rather
extensive.

file from a bio or fp. Added some more constification to the BN library.

script, translates function codes better and doesn't need the K&R function
prototypes to work (NB. the K&R prototypes can't be wiped just yet: they are
still needed by the DEF generator...). I also ran the script with the -rewrite
option to update all the header and source files.

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