add notes about the reason for https://github.com/k9mail/k-9/pull/367

                out.flush();

                mSeeded = true;

            } catch (IOException e) {

                // Some devices don't have a writable urandom:

                // Certain third-party android builds replace urandom with

                // frandom and erandom, which make urandom into a symlink to

                // erandom

                // Details can be found in

                // https://github.com/k9mail/k-9/pull/367

                mSeeded = true;

            }

        }