Update CHANGELOG file to show the new features.

CHANGELOG

@@ -1,5 +1,24 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o [NSE] Added the target NSE library to let scripts to add new
+  discovered targets onto Nmap scanning queue. This feature, coupled
+  with the new prerule is well suited for NSE host discovery. [Djalal]
+
+o [NSE] Added a prerule support to dns-zone-transfer script, which
+  lets the script to run during the script pre-scanning phase to
+  perform DNS zone transfer discovery operations when the necessary
+  script arguments are given. [Djalal]
+
+o [NSE] Nmap now have three different NSE script scan phases. The first
+  one is the script pre-scanning phase, which will run before any Nmap
+  scan operation. Scripts during this phase are activated by the new
+  rule prerule. The second phase is the classic script scan one, which
+  will run for every host group. Scripts during this phase are
+  activated by the classic portrules and hostrules. The third phase
+  is the script post-scanning one, which will run after all Nmap scan
+  operations. Scripts are activated during this phase by the new rule
+  postrule. [Djalal]
+
 o Changed the name of libdnet's sctp_chunkhdr to avoid a conflict with
   a struct of the same name in <netinet/sctp.h>. This caused a
   compiliation error when Nmap was compiled with an OpenSSL that had