[PATCH 1/2] NEWS: deprecate pre-1.4.0 Xapian

[David Bremner]

We want to give people some heads up before dropping support, since
removing a bunch of ifdefs will be a pain to revert.
---
 NEWS | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/NEWS b/NEWS
index a5eb6439..bc96c1b7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,12 @@
 Notmuch 0.27 (UNRELEASED)
 =========================
 
+Dependencies
+------------
+
+As of this release, support for versions of Xapian before 1.4.0 is
+deprecated, and may disappear in a future release of notmuch.
+
 Notmuch 0.26.2 (2018-04-28)
 ===========================
 
-- 
2.17.0