Make the mail example imap4client.py compatible with servers require SSL

[argonemyth]

The example only works with an IMAP server that doesn't require SSL. The script hangs if you try to access servers like imap.gmail.com. I guess a lot of people might try Gmail with this script, it's better to make it compatible with servers that require SSL.

The script should also stop the reactor once the job is finished.

[argonemyth]

The main reason why it hangs when you try to connect to a Gmail account is that it doesn't initiate a SSL connection if you only change the port number to 993. I fixed the issue by using reactor.connectSSL if an user input '993' as the port number.

A note on Gmail! It's been using 'XOAUTH' as authentication method since 2010. So, only 'clear-text' (the insecure way) is available for gmail accounts. I tested the script on an IMAP server that supports PLAIN auth, worked well.

I also modified the example a bit to fit the coding standard. Please review (5697-imap4client-20120612.patch), Thanks!

[itamarst]

(In [34752]) Branching to 'imap-example-5697'

[itamarst]

(In [34756]) Merge imap-example-5697: Improvements to the IMAP client example.

Author: argonemyth Reviewer: itamar Fixes: #5697

[Slavon]

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