ruby-build 20141222

Closes #35183.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
new formula: nikto

formula shamelessly stolen from Homebrew/homebrew#28537 and updated which is in
turn a formula shamelessly stolen from Homebrew/homebrew#11055 and updated

Closes #35182.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
nikto: general cleanup.