Fix typo (related to issue 6535)
FBTest: new tracing for lib/textSearch test
Issue 6532: 	Add st to command line help
LastCommandLineResult command should be a variable not a getter (related to issue 6532)
Move command modules into 'commands'
Update module paths
 Issue 6530: 	JavaScript filter doesn't work for scripts with incorrect MIME type
Use file extension to get net file category as a last resort (related to issue 6530)