Add support for g_auto(s)list to G_DECLARE'd types
_GLIB_DEFINE_AUTOPTR_CHAINUP to declare
glib_autoptr_cleanup_* functions, but they lack of support for lists.
Added such support, refactored a bit the code to avoid duplication (this last commit isn't the nicest maybe, so we can discuss how to get it nicer or just keep the duplication - this is also another option 3v1n0/glib@b0eafa16 that can be factorized more too), and added tests to check this.
EDIT: also, wondering... Wouldn't be the case to have
G_DEFINE_AUTOPTR_CLEANUP_FUNC(char, g_free) as global to make possible to use
g_autoptr(char) (which I don't like much to be honest, since we already have
g_autofree for this, but instead we might set it only for
gchar or define a new type), but most of all
g_auto(s)list(char) set for everybody?
Or better, adding a new
G_DEFINE_AUTOPTR_LISTS_CLEANUP_FUNCS(char, g_free) or something like this in case we only want to serve the