Two new functions to write out PKCS#8 private keys. Also fixes for some of
the the PBE code and a new constant PKCS5_DEFAULT_ITER for the default
iteration count if it is passed as zero.

util/libeay.num

diff --git a/util/libeay.num b/util/libeay.num
index a4907c1..0ff1cd9 100755
--- a/util/libeay.num
+++ b/util/libeay.num
@@ -1769,3 +1769,5 @@
 PKCS5_pbe2_set                          1794
 PKCS5_PBKDF2_HMAC_SHA1                  1795
 PKCS5_v2_PBE_keyivgen                   1796
+PEM_write_bio_PKCS8PrivateKey           1797
+PEM_write_PKCS8PrivateKey               1798