Kill evil casts, fix PKCS#7 and add new X509V3 Function.

util/libeay.num

diff --git a/util/libeay.num b/util/libeay.num
index 12cebd3..1a1b21a 100755
--- a/util/libeay.num
+++ b/util/libeay.num
@@ -1618,3 +1618,4 @@
 sk_X509_EXTENSION_shift                 1643
 sk_X509_EXTENSION_push                  1644
 sk_X509_NAME_ENTRY_find                 1645
+X509V3_EXT_i2d                          1646