Update beef_strike.cna

Update beef_strike.cna but some verification still need to be do especially for web Cloner and Mass mailer.
Targeted commands

the "Open drive-by" feature can now send specified BeEF's command if the new zombie match a pre-defined conditions. Usefull to modify the behavior of a same command module depending of the target in front. (effective in social engineering scenario).
Merge pull request #27 from benyG/master

Targeted commands