No check on user passwords

[divc13]

There was no check provided on user passwords.
One could just enter a space and set such trivial passwords.
This is a serious security issue.

[chethan58]

Changed , Now Password must be between 8 and 24 characters long and include at least one uppercase letter, one lowercase letter, one number, and one of the following symbols: ! @ # $ % ^ & * ( ) _ +. verify and comment if anything is wrong else close issue.