message: added --resume-from option to the parser
diff: @@ -130,6 +130,13 @@ pub fn initialize() -> App<'static, 'static> {
  .help("Output file to write results to (use w/ --json for JSON entries)")
  .takes_value(true),
  )
  + .arg(
  + Arg::with_name("resume_from")
  + .long("resume-from")
  + .value_name("FILE")
  + .help("State file from which to resume a partially complete scan")
  + .takes_value(true),
  + )
  .arg(
  Arg::with_name("debug_log")
  .long("debug-log")
  