- Update to 0.9.6

Changelog libpcap 0.9.6:
- Put the public libpcap headers into a pcap subdirectory in both the
  source directory and the target include directory, and have include
  files at the top-level directory to include those headers, for 
  backwards compatibility.
- Add Bluetooth support
- Add USB capturing support on Linux
- Add support for the binary USB sniffing interface in Linux
- Add support for new FreeBSD BIOCSDIRECTION ioctl
- Add additional filter operations for 802.11 frame types
- Add support for filtering on MTP2 frame types
- Propagate some changes from the main branch, so the x.9 branch has 
  all the DLT_ and LINKTYPE_ values that the main branch does
- Reserved a DLT_ and SAVEFILE_ value for PPI (Per Packet Info) 
  encapsulated packets
- Add LINKTYPE_ for IEEE 802.15.4, with address fields padded as done 
  by Linux drivers
- Add LINKTYPE_ value corresponding to DLT_IEEE802_16_MAC_CPS.
- Add DLT for IEEE 802.16 (WiMAX) MAC Common Part Sublayer
- Add DLT for Bluetooth HCI UART transport layer
- When building a shared library, build with "-fPIC" on Linux to
  support x86_64
- Link with "$(CC) -shared" rather than "ld -shared" when building a 
  ".so" shared library
- Add support for autoconf 2.60
- Fixes to discard unread packets when changing filters
- Changes to handle name changes in the DAG library resulting from 
  switching to libtool.
- Add support for new DAG ERF types.
- Add an explicit "-ldag" when building the shared library, so the DAG
  library dependency is explicit.
- Mac OSX fixes for dealing with "wlt" devices
- Fixes in add_or_find_if() & pcap_findalldevs() to optimize
  generating device lists
- Fixed a bug in pcap_open_live(). The return value of
  PacketSetHwFilter was not checked. 


Port maintainer (bms@FreeBSD.org) is cc'd.

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