Freeciv

Noticed a long ago somewhere on OSDN, now let it have a ticket. In client/editor.c, edit_buffer_copy() does an iteration to copy regular improvements of a city, but paste_tile() does nothing with it. Obvious cause of it is that editor can send only few data in city creating packet and needs to get the new city's id to do further modification. Probably, a hook of some type should be designed. IDK should something be changed in released branches save for removing redundant code.