EscapeSpecialCharsGenQuery addes "\" in front of the known special characters that cannot be passed to GenQuery directly.

IcommandChanOut executes the given icommand `cmdStr` and return output line-by-line to the channel `out`.

IcommandFileOut executes the given icommand `cmdStr` and write stdout to the to provided `fstdout` filename.

IcommandWriterOut executes the given icommand `cmdStr` and write stdout to the to provided writer `wout`.