Function nginx::X509_PURPOSE_add

pub unsafe extern "C" fn X509_PURPOSE_add(
    id: c_int, 
    trust: c_int, 
    flags: c_int, 
    ck: Option<unsafe extern "C" fn(arg1: *const X509_PURPOSE, arg2: *const X509, arg3: c_int) -> c_int>, 
    name: *const c_char, 
    sname: *const c_char, 
    arg: *mut c_void
) -> c_int