Implement password policies for user passwords (chars number, mandatory mixed case, etc)

As suggested on devs@xwiki.org :

Does XWiki has any password policies ?. I could see that it accepts the
password even if it is a single character. Or is there any configuration
need to be provided for this ? Please help. I am using XE1.6

Is this possible to achieve this using XWIKI-2384 ?