Add new Portscan preproc options in GUI, add new Search Performance params, fix HTML class type error

January 29, 2013

Change Log
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Added two new configuration parameters in the GUI for the Portscan 
preprocessor to help with tuning out false positives.  Added the { sense_level } 
and { ignore_scanners } options as configurable parameters in the GUI on 
the PREPROCESSORS tab.  The { ignore_scanners } entity must be supplied 
as a defined alias.

Added some additional Search Performance parameter choices to the INTERFACE 
EDIT tab.  These new values are available in later versions of Snort to enhance 
performance.  AC-SPLIT is often suggested to increase performance without 
too much memory consumption.  The three -NQ options are non-queued versions 
of existing options.

Fixed a small HTML formatting error on the RULES tab where a table cell 
CSS class was misspelled.