remove compatibility notes that no longer apply

DES_random_key() generates a random key.  The PRNG must be seeded

prior to using this function (see L<rand(3)|rand(3)>).  If the PRNG

could not generate a secure key, 0 is returned.  In earlier versions

of the library, DES_random_key() did not generate secure keys.

could not generate a secure key, 0 is returned.

Before a DES key can be used, it must be converted into the

architecture dependent I<DES_key_schedule> via the

is returned.  If the key is a weak key, then -2 is returned.  If an

error is returned, the key schedule is not generated.

DES_set_key() (called DES_key_sched() in the MIT library) works like

DES_set_key() works like

DES_set_key_checked() if the I<DES_check_key> flag is non-zero,

otherwise like DES_set_key_unchecked().  These functions are available

for compatibility; it is recommended to use a function that does not

depend on a global variable.

DES_set_odd_parity() (called DES_fixup_key_parity() in the MIT

library) sets the parity of the passed I<key> to odd.

DES_set_odd_parity() sets the parity of the passed I<key> to odd.

DES_is_weak_key() returns 1 is the passed key is a weak key, 0 if it

is ok.  The probability that a randomly generated key is weak is

In OpenSSL 0.9.7, all des_ functions were renamed to DES_ to avoid

clashes with older versions of libdes.  Compatibility des_ functions

are provided for a short while, as well as crypt().

Declarations for these are in <openssl/des_old.h>.  des_random_seed()

is were not kept as DES_ variants.  This will happen to other functions

Declarations for these are in <openssl/des_old.h>. There is no DES_

variant for des_random_seed().

This will happen to other functions

as well if they are deemed redundant (des_random_seed() just calls

RAND_seed() and is present for backward compatibility only), buggy or

already scheduled for removal.