Fix small error

While Exim use Spam, we should use Spam instead Junk here too. Otherwise, there will be two folders created: Spam and Junk
Also, directly delete spam instead moving to Junk (and mix with ham messages).
Small fixes

While Exim use Spam, we should use Spam instead Junk here too. Otherwise, there will be two folders created: Spam and Junk
Also, directly delete spam instead moving to Junk (and mix with ham messages).
Small fixes

While Exim use Spam, we should use Spam instead Junk here too. Otherwise, there will be two folders created: Spam and Junk
Also, directly delete spam instead moving to Junk (and mix with ham messages).
Merge pull request #133 from demlasjr/master

Small fixes into Roundcube settings. Thanks demlasjr