[PATCH v3 5/5] Update documentation

[Todd]

---
 NEWS                              | 11 +++++++++++
 doc/man7/notmuch-search-terms.rst |  6 ++++++
 2 files changed, 17 insertions(+)

diff --git a/NEWS b/NEWS
index abb5ad7..baa4519 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,5 @@
 Notmuch 0.20 (UNRELEASED)
+=========================
 
 Contrib
 -------
@@ -7,6 +8,16 @@ Contrib
 previously provided by `notmuch-deliver` should now be provided by
 `notmuch insert`, provided by the main notmuch binary.
 
+Command-Line Interface
+----------------------
+
+There is a new `mimetype:` search prefix
+
+  The new `mimetype:` search prefix allows searching for the
+  content-type of attachments, which is now indexed by `notmuch
+  insert`. See the `notmuch-search-terms` manual page for details.
+
+
 Notmuch 0.19 (2014-11-14)
 =========================
 
diff --git a/doc/man7/notmuch-search-terms.rst b/doc/man7/notmuch-search-terms.rst
index 1acdaa0..8d1acfc 100644
--- a/doc/man7/notmuch-search-terms.rst
+++ b/doc/man7/notmuch-search-terms.rst
@@ -40,6 +40,8 @@ indicate user-supplied values):
 
 -  attachment:<word>
 
+-  mimetype:<word>
+
 -  tag:<tag> (or is:<tag>)
 
 -  id:<message-id>
@@ -66,6 +68,10 @@ by including quotation marks around the phrase, immediately following
 The **attachment:** prefix can be used to search for specific filenames
 (or extensions) of attachments to email messages.
 
+The **mimetype:** prefix can be used to search for the specific
+content-types of mime parts within email messages (as specified by the
+sender).
+
 For **tag:** and **is:** valid tag values include **inbox** and
 **unread** by default for new messages added by **notmuch new** as well
 as any other tag values added manually with **notmuch tag**.
-- 
1.9.1