[PATCH 4/4] doc: document notmuch new --full-scan

[David Bremner]

---
 doc/man1/notmuch-new.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/man1/notmuch-new.rst b/doc/man1/notmuch-new.rst
index 16af5492..b0016ccc 100644
--- a/doc/man1/notmuch-new.rst
+++ b/doc/man1/notmuch-new.rst
@@ -59,6 +59,12 @@ Supported options for **new** include
 
     See also ``index.decrypt`` in **notmuch-config(1)**.
 
+``--full-scan``
+    By default notmuch-new uses directory modification times (mtimes)
+    to optimize the scanning of directories for new mail. This option
+    allows turning that optimization off e.g. for testing or
+    debugging.
+
 EXIT STATUS
 ===========
 
-- 
2.17.0