rename map -> oldmap and mark it as deprecated

LinearMap is quite a bit faster, and is fully owned/sendable without
requiring copies. The older std::map also doesn't use explicit self and
relies on mutable fields.

src/libsyntax/parse/parser.rs

@@ -87,7 +87,7 @@ use core::either;
 use core::result::Result;
 use core::vec::push;
 use core::vec;
-use std::map::HashMap;
+use std::oldmap::HashMap;
 
 #[deriving_eq]
 enum restriction {