Simplify detection of modified sources

The previous implementation had some flaws
  If multilineProcessingEnabled was false
  the server would ignore useAutolineMatching
  and presume it to be false (though the default is true)
  This meant it needed to be explicitly set to false to
  prevent polling Sensulogic at every chef run
  Instead of trying to build my own complicated comparison logic
  this change doesn't bother checking values that aren't set