[master] mention some dhcp components

README

@@ -22,8 +22,9 @@ AXFR inbound service, b10-xfrout outgoing AXFR service, b10-zonemgr
 secondary manager, b10-stats statistics collection and reporting
 daemon, b10-stats-httpd for HTTP access to XML-formatted stats,
 b10-host DNS lookup utility, and a new libdns++ library for C++
-with a python wrapper. BIND 10 also provides an experimental DHCPv6
-echo server, b10-dhcp6.
+with a python wrapper. BIND 10 also provides experimental DHCPv4
+and DHCPv6 servers, b10-dhcp4 and b10-dhcp6, a portable DHCP library,
+libdhcp++, and a DHCP benchmarking tool, perfdhcp.
 
 Documentation is included with the source. See doc/guide/bind10-guide.txt
 (or bind10-guide.html) for installation instructions.  The