Create a section of the notmuch(1) manpage to have some place to put
this documentation.
If set to a non-empty value, the notmuch library will print (to
stderr) Xapian queries it constructs.
If set to a non-empty value, the notmuch library will print (to
stderr) Xapian queries it constructs.
+EXTERNAL COMMANDS
+=================
+
+When given a subcommand `foo` not recognized as built-in, notmuch will
+try to run the command (e.g. script) `notmuch-foo` in the user's
+path. The :envvar:`NOTMUCH_CONFIG` will be set according to
+:option:`--config`, if the latter is present.
+