message: added RUST_LOG=off to turn off logging completely
diff: @@ -15,7 +15,11 @@ pub fn initialize(verbosity: u8) {
  // use occurrences of -v on commandline to or verbosity = N in feroxconfig.toml to set
  // log level for the application; respects already specified RUST_LOG environment variable
  match env::var("RUST_LOG") {
  - Ok(_) => {} // RUST_LOG found, don't override
  + Ok(var) => {
  + if var.to_ascii_lowercase() == "off" {
  + return;
  + }
  + } // RUST_LOG found, don't override
  Err(_) => {
  // only set log level based on verbosity when RUST_LOG variable doesn't exist
  match verbosity {
  