返回值
The message from the last obscure check or FALSE if there was no obscure
checks made so far.
The returned message is one of:
it's WAY too short
it is too short
it does not contain enough DIFFERENT characters
it is all whitespace
it is too simplistic/systematic
it looks like a National Insurance number.
it is based on a dictionary word
it is based on a (reversed) dictionary word
strong password