Function nginx::DSA_meth_set_verify

pub unsafe extern "C" fn DSA_meth_set_verify(
    dsam: *mut DSA_METHOD, 
    verify: Option<unsafe extern "C" fn(arg1: *const c_uchar, arg2: c_int, arg3: *mut DSA_SIG, arg4: *mut DSA) -> c_int>
) -> c_int