support for encrypted content type in PKCS7_set_content().

Prototypes and constant declarations for non-copying reads and writes for
BIO pairs (which is totally untested as of now, so I don't yet commit
the actual source code, but reserve the numbers to avoid conflicts).

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

while implementing and using it.

it is not needed.

the length of negative integers.

documentation to reflect the STACK_OF(CONF_VALUE) change to the CONF lib and
use ANSI typedefs for X509V3_EXT_I2D and X509V3_EXT_FREE.

Submitted by: Jeon KyoungHo <khjeon@sds.samsung.co.kr>

the the PBE code and a new constant PKCS5_DEFAULT_ITER for the default
iteration count if it is passed as zero.

structure and decides what key to generate (if any). Not currently added to
the PBE algorithm list because it is largely untested.

AlgorithmIdentifier and make various ASN1 fixes.

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

in cryptlib.h (which is often included as "../cryptlib.h"), then the
question remains relative to which directory this is to be interpreted.
gcc went one further directory up, as intended; but makedepend thinks
differently, and so probably do some C compilers.  So the ../ must go away;
thus e_os.h goes back into include/openssl (but I now use
#include "openssl/e_os.h" instead of <openssl/e_os.h> to make the point) --
and we have another huge bunch of dependency changes.  Argh.

There were problems with putting e_os.h just into the top directory,
because the test programs are compiled within test/ in the "standard"
case in in their original directories in the makefile.one case;
and in the latter symlinks may not be available.

include file.

integers was completely broken. Also added a NEG_PUBKEY_BUG compilation option
to compensate for public keys improperly encoded as negative integers.