replace synchronization primitives with those from parking_lot (#1593)

* parking_lot in cargo.toml

* replace all lock invocations with parking_lot ones

* use parking_lot synchronization primitives

util/src/misc.rs

@@ -64,29 +64,4 @@ pub fn version_data() -> Bytes {
 	s.append(&rustc_version());
 	s.append(&&Target::os()[0..2]);
 	s.out()
-}
-
-/// Object can be locked directly into a `MutexGuard`.
-pub trait Lockable<T> {
-	/// Lock object directly into a `MutexGuard`.
-	fn locked(&self) -> MutexGuard<T>;
-}
-
-impl<T> Lockable<T> for Mutex<T> {
-	fn locked(&self) -> MutexGuard<T> { self.lock().unwrap() }
-}
-
-/// Object can be read or write locked directly into a guard.
-pub trait RwLockable<T> {
-	/// Read-lock object directly into a `ReadGuard`.
-	fn unwrapped_read(&self) -> RwLockReadGuard<T>;
-
-	/// Write-lock object directly into a `WriteGuard`.
-	fn unwrapped_write(&self) -> RwLockWriteGuard<T>;
-}
-
-impl<T> RwLockable<T> for RwLock<T> {
-	fn unwrapped_read(&self) -> RwLockReadGuard<T> { self.read().unwrap() }
-	fn unwrapped_write(&self) -> RwLockWriteGuard<T> { self.write().unwrap() }
-}
-
+}