man: document NOTMUCH_DEBUG_QUERY

This is is really functionality of the library, but CLI users might
not look at library docs even if they existed beyond notmuch.h

diff --git a/man/man1/notmuch.1 b/man/man1/notmuch.1
index 923fefecb247731ba36de9dc1eb45854800f4174..033cc107f31383119c9dd7e1bbc8bf8cb52c98bc 100644 (file)
--- a/man/man1/notmuch.1
+++ b/man/man1/notmuch.1
@@ -164,6 +164,11 @@ Location to write a talloc memory usage report. See
 in \fBtalloc\fR(3)
 for more information.
 
+.TP
+.B NOTMUCH_DEBUG_QUERY
+If set to a non-empty value, the notmuch library will print (to stderr) Xapian
+queries it constructs.
+
 .SH SEE ALSO
 
 \fBnotmuch-config\fR(1), \fBnotmuch-count\fR(1),