SERVER-10930 Clean up output for parsing errors and show option name in duplicate option error
adding try/catch around boost::filesystem::exists() to handle inaccessible path.

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
adding try/catch around boost::filesystem::exists() to handle inaccessible path (fixed indent).

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-10471 merge index bounds, enumerate based on indices, bug fixes