Create sophos_wpa_iface_exec

This module exploits both bugs in http://www.zerodayinitiative.com/advisories/ZDI-14-069/
Fix disclosure date, earlier than I thought
move file to .rb ext
Fix heartbleed module

-) incorrect length read
-) Parse TLS errors
Added RFC link
Fix case / when indention
Land #3211, @Firefart's heartbleed comment reference
Restore author credit
Land #3213, @todb-r7's fix
Make the title of the Heartbleed module searchable

Right now, the title does not actually tie the Heartbeat check to the
Heartbleed attack, so people searching strictly on module title are not
going to get a hit for this module.
Land #3208 - Sophos Web Protection Appliance Interface Authenticated Exec
Land #3217, @todb-r7's title fix for Hearbleed module