bug#17200: Mailutils test failures

[Mark H Weaver]

With current master, mailutils fails its test suite on my x86_64
machine.  The failures are in imap4d/testsuite/imap4d/fetch.exp:

--8<---------------cut here---------------start------------->8---
Running 
/tmp/nix-build-mailutils-2.2.drv-1/mailutils-2.2/imap4d/testsuite/imap4d/fetch.exp
 ...
FAIL: FETCH 3 BODY[1.MIME]
FAIL: FETCH 4 BODY[2.2.1]
FAIL: FETCH 4 BODY[2.2.1.TEXT]
FAIL: FETCH 4 BODY[2.2.TEXT]
FAIL: FETCH 5 BODY[2.TEXT]
--8<---------------cut here---------------end--------------->8---

      Mark