soundness bug in anymap (#160)

- Replace the use of anymap with a map of String -> String.

- Rename the dubious `Meta` type to `ActionMeta` to better reflect its
  purpose.

- Now that a meatdata predicate is based on String we can derive
  `Predicate` equality instead of jumping through hoops.

- Removed some dead code around the EXT-IP hack exposed by this
  change.

Author: rzezeski

kstat-macro/Cargo.lock

@@ -39,21 +39,6 @@ postcard = { version = "0.7.0", features = ["alloc"], default-features = false }
 usdt = { version = "0.3.2", optional = true }
 zerocopy = "0.6.1"
 
-#
-# XXX I'm using both anymap (and Miachel's no_std branch) purely out
-# of convenience. At this time I'm pretty sure I want to make use of
-# Any for some runtime polymorphism for the purpose of dealing with
-# port resources. I noticed that anymap does not seem to be actively
-# maintained (though it also seems fairly complete with the exception
-# of no_std support and maybe a handful of other things), so we may
-# want to come back around and just use Any directly for our purposes.
-# Even if we stick with anymap, we certainly don't want to rely on
-# someone's branch going forward.
-#
-[dependencies.anymap]
-git = "https://github.com/michaelmelanson/anymap"
-branch = "no_std"
-
 [dependencies.serde]
 version = "1.0"
 default-features = false