OK, I missed that in the release notes. Two points here:

   * The naming of the options is horrible, sometimes it's "sigs", sometimes it's "signatures". I would prefer if we named them consistently (probably "signatures", it's easier to search for).

   * Given the myriad of warning-related options, It is *extremely* hard to figure out which one caused the actual warning in question. The solution to this is very easy and done this way in clang/gcc (don't remember which one, I'm switching quite often): Just suffix all warnings consistently with the option causing it, e.g.

    Top-level binding with no type signature: [ -Wmissing-pat-syn-sigs]: