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-What's new in IPFilter 4.1
-==========================
-(Well, compared to 3.*, anyway)
-In no particular order, except headline alphabetical:
-
-Administration:
-	- Run-time support for modifying ipf table size parameters.
-	- Run-time support for tuning other ipfilter parameters.
-
-Content Scanning:
-	- Simple matching of content for TCP session startup.
-
-Firewall Synchronising:
-	- Master/slave programs available.
-
-General:
-	- All input files allow simple 'marco' definitions and expansion,
-	  including nesting.
-	- Code has been rototilled to make maintenance and enhancements
-	  eaiser for me and you.
-	- More configuration files and binaries.
-	- Takes up more memory.
-	- Probably slower.
-	- Versioned API to support changes in the ABI without breaking
-	  existing binaries (4.0 onward only.)
-	- IP-Filter framework in place for handling multiple different
-	  types of packet matching for firewalling.
-	- IP Id number rewriting available.
-	- Verification of checksums for recognised packet types.
-	- Optionally enable/disable IP forwarding when enabled/disabled.
-
-IPF:
-	- BPF syntax available for matching packets in ipf rules (1).
-	- Can convert IPv4 ipf rules into C code and either:
-	  * load them as an LKM o;
-	  * compile them statically into the kernel (where possible.)
-	- Address pools allow for simpler rules covering large numbers of
-	  addresses/networks (IPv4 only).
-	- Lookup functions available to map an IPv4 address to a group.
-	- Groups can be referenced by multiple heads for subroutine-like use.
-	- NAT/ipf rules can refer to each other via a tag, creating an implied
-	  join that forms part of the packet matching.
-	- Extra packet attributes available for filter rules:
-	  * source address/routing interface mismatch;
-	  * multicast (3);
-	  * broadcast (2,3);
-	  * state lookup partially failed;
-	  * out of the TCP window for a state connection;
-	  * NAT lookup partially failed.
-	- PPS (packets per second) matching available for ipf rules.
-	- Rule collections (cf FreeBSD numbering) supported for ipf rules.
-	- Groups can now be names rather than just numbers
-
-IPV6:
-	- understands extension headers.
-	- can filter on extension headers.
-
-Logging:
-	- ipmon now comes with a configuration file for more advanced logging
-	  behaviour.
-	- Can append arbitrary logging tags with ipf rules for easy matching.
-
-NAT:
-	- "sticky" mapping available to ensure an address translation on
-	  a per-address basis is always the same (while known) for a set
-	  IP address.
-
-Operating System Support:
-	- HP-UX 11 added.
-	- Tru64 5.1a added.
-	- Solaris/HP-UX now use pfil STREAMS module.
-	- Linux 2.4 on the way.
-
-Proxies:
-	- PPTP proxy added.
-	- IRC proxy added.
-	- RPCBIND proxy added.
-	- FTP proxy support for EPSV (IPv4 only.)
-
-Stateful Inspection:
-	- Can insist that all TCP data arrives in order.
-	- Can insist that all fragments pass through in order.
-	- The number of states created per-rule can be set where the total
-	  across all rules may exceed the maximum allowed.
-	- Can elect not to automatically match ICMP error packets.
-	- TCP sequence number rewriting supported.
-
-(1) - Requires libpcap for rule parsing
-(2) - On Solaris/HP-UX, broadcast packets are seen as multicast packets.
-(3) - Not supported on SunOS4