a830dbcab3
Introduce an `object_subtype` argument to the args array for `register_meta()` which can be used to limit meta registration to a single subtype (e.g. a custom post type or taxonomy, vs all posts or taxonomies). Introduce `register_post_meta()` and `register_term_meta()` wrapper methods for `register_meta` to provide a convenient interface for the common case of registering meta for a specific taxonomy or post type. These methods work the way plugin developers have often expected `register_meta` to function, and should be used in place of direct `register_meta` where possible. Props flixos90, tharsheblows, spacedmonkey. Fixes #38323. git-svn-id: https://develop.svn.wordpress.org/trunk@43378 602fd350-edb4-49c9-b593-d223f7449a82