Cain & Abel v4.9.21 released

[+] Added dictionary attack variant "Double" to check for repeated passwords (Pass -> PassPass).
[+] Added dictionary attack variant "Numbers substitution permutations" with the following substitution rules:
o or O -> 0; i or I -> 1; z or Z -> 2; e or E -> 3; a or A -> 4; s or S -> 5;
[!] Modified the dictionary attack to support dictionary words with <space> character.
[!] Fixed some uppercase-only bugs in Dictionary Password Crackers.
[!] Fixed error lookup function to avoid "Failed to retrive error description !" message.