Renamed a bunch of lock variables.

"synchLock" will become confusing when we have lots of objects with "sync" in the name.

briar-core/src/org/briarproject/lifecycle/ShutdownManagerImpl.java

@@ -9,9 +9,9 @@ import org.briarproject.api.lifecycle.ShutdownManager;
 
 class ShutdownManagerImpl implements ShutdownManager {
 
-	private final Lock synchLock = new ReentrantLock();
+	private final Lock lock = new ReentrantLock();
 
-	// The following are locking: synchLock
+	// The following are locking: lock
 	protected final Map<Integer, Thread> hooks;
 	private int nextHandle = 0;
 
@@ -20,7 +20,7 @@ class ShutdownManagerImpl implements ShutdownManager {
 	}
 
 	public int addShutdownHook(Runnable r) {
-		synchLock.lock();
+		lock.lock();
 		try {
 			int handle = nextHandle++;
 			Thread hook = createThread(r);
@@ -28,7 +28,7 @@ class ShutdownManagerImpl implements ShutdownManager {
 			Runtime.getRuntime().addShutdownHook(hook);
 			return handle;
 		} finally {
-			synchLock.unlock();
+			lock.unlock();
 		}
 
 	}
@@ -38,13 +38,13 @@ class ShutdownManagerImpl implements ShutdownManager {
 	}
 
 	public boolean removeShutdownHook(int handle) {
-		synchLock.lock();
+		lock.lock();
 		try {
 			Thread hook = hooks.remove(handle);
 			if (hook == null) return false;
 			else return Runtime.getRuntime().removeShutdownHook(hook);
 		} finally {
-			synchLock.unlock();
+			lock.unlock();
 		}
 
 	}