message: tweaked help output
diff: @@ -21,7 +21,7 @@ pub fn initialize() -> App<'static, 'static> {
  .long("url")
  .required(true)
  .value_name("URL")
  - .help("The target URL"),
  + .help("The target URL (required, unless passing urls on STDIN)"),
  )
  .arg(
  Arg::with_name("threads")
  @@ -52,6 +52,7 @@ pub fn initialize() -> App<'static, 'static> {
  .short("p")
  .long("proxy")
  .takes_value(true)
  + .value_name("PROXY")
  .help(
  "Proxy to use for requests (ex: http(s)://host:port, socks5://host:port)",
  ),
  @@ -98,14 +99,14 @@ pub fn initialize() -> App<'static, 'static> {
  .short("r")
  .long("redirects")
  .takes_value(false)
  - .help("Follow redirects (default: false)")
  + .help("Follow redirects")
  )
  .arg(
  Arg::with_name("insecure")
  .short("k")
  .long("insecure")
  .takes_value(false)
  - .help("Disables TLS certificate validation (default: false)")
  + .help("Disables TLS certificate validation")
  )
  .arg(
  Arg::with_name("extensions")
  @@ -116,7 +117,7 @@ pub fn initialize() -> App<'static, 'static> {
  .multiple(true)
  .use_delimiter(true)
  .help(
  - "File extension(s) to search for (accepts multi-flag and space or comma-delimited: -x php -x pdf js)",
  + "File extension(s) to search for (ex: -x php -x pdf js)",
  ),
  )
  .arg(
  @@ -128,7 +129,7 @@ pub fn initialize() -> App<'static, 'static> {
  .multiple(true)
  .use_delimiter(true)
  .help(
  - "Specify HTTP headers, -H Header:val 'stuff: things' -H 'MoHeaders: movals'",
  + "Specify HTTP headers (ex: -H Header:val 'stuff: things')",
  ),
  )
  .arg(
  @@ -136,14 +137,14 @@ pub fn initialize() -> App<'static, 'static> {
  .short("n")
  .long("norecursion")
  .takes_value(false)
  - .help("Do not scan recursively (default: scan recursively)")
  + .help("Do not scan recursively")
  )
  .arg(
  Arg::with_name("addslash")
  .short("f")
  .long("addslash")
  .takes_value(false)
  - .help("Append / to each request (default: false)")
  + .help("Append / to each request")
  )
  .after_help(r#"NOTE:
  Options that take multiple values are very flexible. Consider the following ways of specifying
  