X-OfflineIMAP header

[Johannes Stezenbach]

Hi,

even though the patch might not be applied to git
due to lack of a maintainer, below is a simple patch
which I think fixes the issue.  To test it I commented
out two lines from folder/IMAP.py:

    def savemessage_searchforheader(self, imapobj, headername, headervalue):
        #if imapobj.untagged_responses.has_key('APPENDUID'):
        #    return long(imapobj.untagged_responses['APPENDUID'][-1].split(' ')[1])

Then the UID SEARCH command is executed with my IMAP servers and
returned the desired result.

Thanks
Johannes

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