When the port state is open|filtered should be unknown, no open

Author: Sinkmanu

lib/rex/parser/nmap_nokogiri.rb

@@ -17,7 +17,7 @@ def determine_port_state(v)
         Msf::ServiceState::Closed
       when "filtered"
         Msf::ServiceState::Filtered
-      when "unknown"
+      else
         Msf::ServiceState::Unknown
       end
     end