Auto merge of #23229 - aturon:stab-path, r=alexcrichton

This commit stabilizes essentially all of the new `std::path` API. The
API itself is changed in a couple of ways (which brings it in closer
alignment with the RFC):

* `.` components are now normalized away, unless they appear at the
  start of a path. This in turn effects the semantics of e.g. asking for
  the file name of `foo/` or `foo/.`, both of which yield `Some("foo")`
  now. This semantics is what the original RFC specified, and is also
  desirable given early experience rolling out the new API.

* The `parent` method is now `without_file` and succeeds if, and only
  if, `file_name` is `Some(_)`. That means, in particular, that it fails
  for a path like `foo/../`. This change affects `pop` as well.

In addition, the `old_path` module is now deprecated.

[breaking-change]

r? @alexcrichton 

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libstd/dynamic_lib.rs b/src/libstd/dynamic_lib.rs
index babae3b3019..90373441edc 100644
--- a/src/libstd/dynamic_lib.rs
+++ b/src/libstd/dynamic_lib.rs
@@ -14,6 +14,7 @@
 
 #![unstable(feature = "std_misc")]
 #![allow(missing_docs)]
+#![allow(deprecated)] // will be addressed by #23197
 
 use prelude::v1::*;