pub unsafe extern "C" fn ngx_http_merge_types(
cf: *mut ngx_conf_s,
keys: *mut *mut ngx_array_t,
types_hash: *mut ngx_hash_t,
prev_keys: *mut *mut ngx_array_t,
prev_types_hash: *mut ngx_hash_t,
default_types: *mut ngx_str_t,
) -> *mut i8