Fix a bug where only the first enabled post type would be resynchronized during plugin activation.

$enabled_post_types is populated as each CPT module loads, and during activation modules load lazily, not all at once. As a result, the first post type module that's asked to resynchronize sees only a partial list of enabled post types.

Fixed by loading active modules (with context == all) before starting the notification process. Note that this won't load on-demand modules like parsers (at least not by immediately).

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@892997 b8457f37-d9ea-0310-8a92-e5e31aec5664