Deprecated attributes don't take 'feature' names and are paired with stable/unstable

Conflicts:
	src/libcore/atomic.rs
	src/libcore/finally.rs
	src/test/auxiliary/inherited_stability.rs
	src/test/auxiliary/lint_stability.rs

src/libstd/thread_local/mod.rs

@@ -319,7 +319,8 @@ impl<T: 'static> Key<T> {
     }
 
     /// Deprecated
-    #[deprecated(feature = "oldstuff", since = "1.0.0",
+    #[unstable(feature = "std_misc")]
+    #[deprecated(since = "1.0.0",
                  reason = "function renamed to state() and returns more info")]
     pub fn destroyed(&'static self) -> bool { self.state() == State::Destroyed }
 }