#23 Adds nuke command to ban, nickban & kick user

[Robin Hill]

This patch adds an extra command (!nuke 'nick') which
allows an OP_ADMIN (or OP with BAN_ALLOW privileges)
to, in one command, add a permanent IP ban, a
permanent nick ban and kick a user.

[Robin Hill]

Logged In: YES
user_id=706482

This patch is also available in my combined patch for 0.7.8

[Robin Hill]

Adds nuke command