Update Wiki to include hashcat w/ combinator attack: 1 dic file only

[r9290xocl]

Hi!

It clearly mentions on the oclhashcat that we need exactly 2 dictionary files for the combinator (combination) attack:

http://hashcat.net/wiki/doku.php?id=oclhashcat

However, I have not seen anything specifying that only 1 dic is needed or required for that attack under hashcat:

http://hashcat.net/wiki/doku.php?id=hashcat
http://hashcat.net/wiki/doku.php?id=combinator_attack

I would suggest including a note for the Wiki of hashcat, or under the attack mode options saying "please specify only one dictionary file"