Log Message:
Update security/ipv6-toolkit to version 1.4.1

Changes since previous version:

	SI6 Networks' IPv6 Toolkit v1.4.1

	   * frag6: Fixed bug that prevented Ethernet header from being filled
	     A bug in the code caused Ethernet frames to go on te wire without any of
	     their header fields completed.

	   * All: Use of library to avoid code replication
	     An "libipv6" library was created, such that common functions do \ 
not need
	     to be replicated for each tool. ni6, ns6, rs6, and tcp6 now employ such
	     library.

pkgsrc changes:

	* address6 and its man page are no longer installed

	* extend the Makefile changes to include the correct linkage for rs6 and tcp6
	  i.e. include the libipv6 object mentioned above