[PATCH] man: document the notmuch --config=FILE global option

[Jani Nikula]

---
 man/man1/notmuch.1 |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man/man1/notmuch.1 b/man/man1/notmuch.1
index e645a35..923fefe 100644
--- a/man/man1/notmuch.1
+++ b/man/man1/notmuch.1
@@ -70,6 +70,15 @@ Print a synopsis of available commands and exit.
 Print the installed version of notmuch, and exit.
 .RE
 
+.RS 4
+.TP 4
+.B \-\-config=FILE
+
+Specify the configuration file to use. This overrides any
+configuration file specified by ${NOTMUCH_CONFIG}.
+
+.RE
+
 .SH COMMANDS
 
 
-- 
1.7.10.4