Give auth_brute ability to try credentials stored in db

Added two options:
DB_USER_PASS: this will try each user/pass couple stored in the db
DB_ADD_ALL: this will add each user and password to the lists.
By setting this to true, auth_brute will try every user with
every known password.
Added webacoo code execution module
Allow deletion of multiple sites
clean up multi delete
Implement Egypt's suggestions

Delete_site input is now validated with =~ /^[0-9]*$/.
Help instructions written in English.
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Added Lotus Protector exploit module.
Fixed exceptions in ms05_054_onload exploit module.
Added BID for ms09_002_memory_corruption.
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