Updated icon downloading

- Added more checks to prevent panics (Removed unwrap)
- Try do download from base domain or add www when the provided domain
  fails
- Added some more domain validation checks to prevent errors
- Added the ICON_BLACKLIST_REGEX to a Lazy Static HashMap which
  speeds-up the checks!
- Validate the Regex before starting/config change.
- Some cleanups
- Disabled some noisy debugging from 2 crates.

src/main.rs

@@ -113,6 +113,9 @@ fn init_logging(level: log::LevelFilter) -> Result<(), fern::InitError> {
         .level_for("launch_", log::LevelFilter::Off)
         .level_for("rocket::rocket", log::LevelFilter::Off)
         .level_for("rocket::fairing", log::LevelFilter::Off)
+        // Never show html5ever and hyper::proto logs, too noisy
+        .level_for("html5ever", log::LevelFilter::Off)
+        .level_for("hyper::proto", log::LevelFilter::Off)
         .chain(std::io::stdout());
 
     // Enable smtp debug logging only specifically for smtp when need.