[Dovecot] dovecot testinstallation does not tell how to quit

[Robert Moskowitz]

I am having problems logging in with RoundCube, so thought I should see 
if there were instructions for testing Dovecot login, and sure enough I 
found some at:

wiki.dovecot.org/Testinstallation

Well it works, so the problem is probably all RoundCube's, but this wiki 
page is missing an important line about how to end the Telnet session 
without killing Telnet!  What is the quit/exit command?  And please add 
this to the wiki!

Oh, I just guessed it:

a logout