Add scary warnings about "realdelete" option
Add scary warnings about "realdelete" option

WARNING: I consider the Gmail "realdelete" option as harmful with the
potential for DATALOSS. Add scary warnings to offlineimap.conf.

See the analysis at
http://article.gmane.org/gmane.mail.imap.offlineimap.general/5265

Deleting a message from a Gmail folder via the IMAP interface will just
remove that folder's label from the message: the message will continue
to exist in the '[Gmail]/All Mail' folder.  If `realdelete` is set to
`True`, then deleted messages will be moved to the '[Gmail]/Trash'
folder.  BEWARE: this will immediately delete a messages from *all
folders* it belongs to!

AS OFFLINEIMAP IMPLEMENTS FOLDER MOVES AS 1) AN ADD and 2) A DELETE (the
order can vary), THIS MEANS THAT A FOLDER MOVE CAN CAUSE DATALOSS. DO
NOT USE IT AND MOVE MAIL TO "[Gmail]/Trash" TO DELETE MAIL FROM
"[Gmail]/All Mail"!

We will need to discuss whether to completely disable that feature.

Signed-off-by: Sebastian Spaeth <98dcb2717ddae152d5b359c6ea97e4fe34a29d4c@SSpaeth.de>

frioux/offlineimap,frioux/offlineimap