Adjust gitignore, fix clippy lints (#257)

* Add .vscode to .gitignore
* Fix clippy lints

.gitignore

@@ -1,2 +1,3 @@
 /target
 **/*.rs.bk
+.vscode/

boringtun-cli/src/main.rs

@@ -153,7 +153,7 @@ fn main() {
         use_multi_queue: !matches.is_present("disable-multi-queue"),
     };
 
-    let mut device_handle: DeviceHandle = match DeviceHandle::new(&tun_name, config) {
+    let mut device_handle: DeviceHandle = match DeviceHandle::new(tun_name, config) {
         Ok(d) => d,
         Err(e) => {
             // Notify parent that tunnel initialization failed

boringtun/src/device/drop_privileges.rs

@@ -32,7 +32,7 @@ pub fn get_saved_ids() -> Result<(uid_t, gid_t), Error> {
         // Saved user ID
         let saved_uid = unsafe { (*userinfo).pw_uid };
 
-        return Ok((saved_uid, saved_gid));
+        Ok((saved_uid, saved_gid))
     }
 }
 

boringtun/src/device/mod.rs

@@ -325,7 +325,7 @@ impl Device {
         )
         .unwrap();
 
-        let peer = Peer::new(tunn, next_index, endpoint, &allowed_ips, preshared_key);
+        let peer = Peer::new(tunn, next_index, endpoint, allowed_ips, preshared_key);
 
         let peer = Arc::new(peer);
         self.peers.insert(pub_key, Arc::clone(&peer));