Log Message:
Update to 2.8.1

Includes fix for CVE-2008-1804

[*] New Additions
* Target-Based support to allow rules to use an attribute table
  describing services running on various hosts on the network.
  Eliminates reliance on port-based rules.
* Support for GRE encapsulation for both IPv4 & IPv6.
* Support for IP over IP tunneling for both IPv4 & IPv6.
* SSL preprocessor to allow ability to not inspect encrypted traffic.
* Ability to read mulitple PCAPs from the command line.
* Support for new CVS rule detection options.

[*] Improvements
* Update to HTTP Inspect to identify overly long HTTP header fields.
* Updates to IPv6 support, including changes to avoid namespace
  conflicts for certain Operating systems.
* Updates to address issues seen on various Sparc platforms.
* Stricter enforcement of shared object versions to avoid API
  conflicts.