No API change involved.

Info: http://curl.haxx.se/mail/lib-2013-02/0234.html

since mails sent are supposed to have CRLF line endings I added them and
now the data size after (\Seen) matches again properly

Corrected a couple of tab characters between test702 and test703, and
between test900 and test901 which should be spaces.

Added one test for a request with matching UIDVALIDITY and one which is
a mismatched request that will fail.

Any IMAP parameter can come in escaped and in double quotes. Added a
simple function to unquote the command parameters and applied it to
the IMAP command handlers.

The whole of FETCH_imap() had one extra space of indentation, whilst
APPEND_imap() used indentation of 2 instead of 4 in places.

The majority of lines, that specify a test file for inclusion, end with
a tab character before the slash whilst some end with a space. Corrected
those that end with a space to end with a tab character as well.

Finished segregating the email protocol tests, into their own protocol
based ranges, in preparation of adding more e-mail related tests to the
test suite.

Continued segregating the email protocol tests, into their own protocol
based ranges, in preparation of adding more e-mail related tests to the
test suite.

Continued segregating the email protocol tests, into their own protocol
based ranges, in preparation of adding more e-mail related tests to the
test suite.

Started segregating the email protocol tests, into their own protocol
based ranges, in preparation of adding more e-mail related tests to the
test suite.

Patch by: Myk Taylor

... hopefully this will also make clang-analyzer stop warning on
potentional NULL dereferences (which were false positives anyway).

When Curl_do() returns failure, the connection pointer could be NULL so
the code path following needs to that that into account.

Bug: http://curl.haxx.se/mail/lib-2013-03/0062.html
Reported by: Eric Hu

Standardised the naming of all perform based functions to be in the form
imap_perform_something().

No more use exit(3) but instead tell libcurl that no byte has been
written to let it return a `CURLE_WRITE_ERROR`. In addition, check
curl easy handle return code.

8 more bugfixes, one change and a bunch of contributors

Moved the custom request processing into the LIST command as the logic
is the same.

Updated the function description comments following commit 4838d196.

Moved the blocking state machine to the disconnect functions so that the
logout / quit functions are only responsible for sending the actual
command needed to logout or quit.

Additionally removed the hard return on failure.

Added comments and simplified convoluted dophase_done comparison.