Function krb5_sys::krb5_appdefault_string

pub unsafe extern "C" fn krb5_appdefault_string(
    context: krb5_context, 
    appname: *const c_char, 
    realm: *const krb5_data, 
    option: *const c_char, 
    default_value: *const c_char, 
    ret_value: *mut *mut c_char
)