core: let the template {% print m.rsc[1] %} print all rescource properties.
Same for {% for k,v in m.rsc[1] %}.%

(cherry picked from commit cc2043c41d137fd8dc47093b156dfc2a2e2ff4f0)
mod_oembed: fix for z_string:to_name/1 now returning a binary.

(cherry picked from commit c6eed46c5e774c41e9c05c8226a04964ce242264)