Raise Msf::OptionValidateError when the PORTS option is invalid

Instead of print_error for invalid ports, modules should be raising
Msf::OptionValidateError to warn the user about the invalid input.
Land #2779, @wchen-r7's mod to raise Msf::OptionValidateError when PORTS is invalid
No at-signs in names please.
Fix chargen probe title, comment on the CVE
Unacronym the title on Poison Ivy C&C
Add OSVDB
Space at EOL
Land #2802, @todb-r7's mods before release