net/ftp: close the connection if the TLS handshake timeout is exceeded.

Otherwise, file descriptor leaks may occur in Net::FTP.new.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56916 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/ftp.rb

@@ -371,7 +371,7 @@ module Net
               voidcmd("PBSZ 0")
               voidcmd("PROT P")
             end
-          rescue OpenSSL::SSL::SSLError
+          rescue OpenSSL::SSL::SSLError, OpenTimeout
             close
             raise
           end