Log Message:
Changes 4.1.1:
* Fix build on systems with PF, such as FreeBSD and OpenBSD.
* Don't blow up if a zero-length link-layer address is passed to
  linkaddr_string().

Changes  4.1.0:
* Fix printing of MAC addresses for VLAN frames with a length
  field
* Add some additional bounds checks and use the EXTRACT_ macros
  more
* Add a -b flag to print the AS number in BGP packets in ASDOT
  notation rather than ASPLAIN notation
* Add ICMPv6 RFC 5006 support
* Decode the access flags in NFS access requests
* Handle the new DLT_ for memory-mapped USB captures on Linux
* Make the default snapshot (-s) the maximum
* Print name of device (when -L is used)
* Support for OpenSolaris (and SXCE build 125 and later)
* Print new TCP flags
* Add support for RPL DIO
* Add support for TCP User Timeout (UTO)
* Add support for non-standard Ethertypes used by 3com PPPoE gear
* Add support for 802.11n and 802.11s
* Add support for Transparent Ethernet Bridge ethertype in GRE
* Add 4 byte AS support for BGP printer
* Add support for the MDT SAFI 66 BG printer
* Add basic IPv6 support to print-olsr
* Add USB printer
* Add printer for ForCES
* Handle frames with an FCS
* Handle 802.11n Control Wrapper, Block Acq Req and Block Ack frames
* Fix TCP sequence number printing
* Report 802.2 packets as 802.2 instead of 802.3
* Don't include -L/usr/lib in LDFLAGS
* On x86_64 Linux, look in lib64 directory too
* Lots of code clean ups
* Autoconf clean ups
* Update testcases to make output changes
* Fix compiling with/out smi (--with{,out}-smi)
* Fix compiling without IPv6 support (--disable-ipv6)