0e38c6ff4f
Complement commit1d7fe7f01b("gdb: Introduce setting construct within cmd_list_element") and commit702991711a("gdb: Have setter and getter callbacks for settings") and update inline documentation accordingly for `add_set_or_show_cmd' and `add_setshow_cmd_full_erased', documenting the `args' parameter and removing references to `var', `set_setting_func' and `get_setting_func'. Approved-By: Simon Marchi <simon.marchi@efficios.com>