[offlineimap] New tls (#222)

[Nicolas Sebrecht]

Removing XOAUTH2 in the configuration option. Fix it in the code I get 

```
ERROR: While attempting to sync account 'nis'
  __init__() got an unexpected keyword argument 'tls_level'

Traceback:
  File "/home/nicolas/dev/official_packages/gitrepos/offlineimap/offlineimap/accounts.py", line 263, in syncrunner
    self.__sync()
  File "/home/nicolas/dev/official_packages/gitrepos/offlineimap/offlineimap/accounts.py", line 326, in __sync
    remoterepos.getfolders()
  File "/home/nicolas/dev/official_packages/gitrepos/offlineimap/offlineimap/repository/IMAP.py", line 384, in getfolders
    imapobj = self.imapserver.acquireconnection()
  File "/home/nicolas/dev/official_packages/gitrepos/offlineimap/offlineimap/imapserver.py", line 490, in acquireconnection
    tls_level=self.tlslevel,
  File "/home/nicolas/dev/official_packages/gitrepos/offlineimap/offlineimap/imaplibutil.py", line 215, in __init__
    IMAP4.__init__(self, *args, **kwargs)
```

---
Reply to this email directly or view it on GitHub:
https://github.com/OfflineIMAP/offlineimap/pull/222#issuecomment-147295398
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