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-What's new in 5.1
-=================
-
-General
--------
-* all of the tuneables can now be set at any time, not just whilst disabled
-  or prior to loading rules;
-
-* group identifiers may now be a number or name (universal);
-
-* man pages rewritten
-
-* tunables can now be set via ipf.conf;
-
-Logging
--------
-* ipmon.conf can now be used to generate SNMPv1 and SNMPv2 traps using
-  information from log entries from the kernel;
-
-NAT changes
------------
-* DNS proxy for the kernel that can block queries based on domain names;        
-
-* FTP proxy can be configured to limit data connections to one or many
-  connections per client;
-
-* NAT on IPv6 is now supported;
-
-* rewrite command allows changing both the source and destination address
-  in a single NAT rule;
-
-* simple encapsulation can now be configured with ipnat.conf,
-
-* TFTP proxy now included;
-
-Packet Filtering
-----------------
-* acceptance of ICMP packets for "keep state" rules can be refined through
-  the use of filtering rules;
-
-* alternative form for writing rules using simple filtering expressions;
-
-* CIPSO headers now recognised and analysed for filtering on DOI;
-
-* comments can now be a part of a rule and loaded into the kernel and
-  thus displayed with ipfstat;
-
-* decapsulation rules allow filtering on inner headers, providing they
-  are not encrypted;
-
-* interface names, aside from that the packet is on, can be present in
-  filter rules;
-
-* internally now a single list of filter rules, there is no longer an
-  IPv4 and IPv6 list;
-
-* rules can now be added with an expiration time, allowing for their
-  automatic removal after some period of time;
-
-* single file, ipf.conf, can now be used for both IPv4 and IPv6 rules;
-
-* stateful filtering now allows for limits to be placed on the number
-  of distinct hosts allowed per rule;
-
-Pools
------
-* addresses added to a pool via the command line (only!) can be given
-  an expiration timeout;
-
-* destination lists are a new type of address pool, primarily for use with
-  NAT rdr rules, supporting newer algorithms for target selection;
-
-* raw whois information saved to a file can be used to populate a pool;
-
-Solaris
--------
-* support for use in zones with exclusive IP instances fully supported.
-
-Tools
------
-* use of matching expressions allows for refining what is displayed or
-  flushed;
-