doc: fix typo in babeld.
diff --git a/doc/babeld.texi b/doc/babeld.texi
index aa19c9a..b7f3d07 100644
--- a/doc/babeld.texi
+++ b/doc/babeld.texi
@@ -14,9 +14,7 @@
a double-stack routing protocol, meaning that a single Babel instance
is able to perform routing for both IPv4 and IPv6.
-Quagga implements Babel as described in RFC6126, as well as the
-``Babel-Z'' extensions that optimise routes for radio frequency
-diversity.
+Quagga implements Babel as described in RFC6126.
@menu
* Configuring babeld::
@@ -33,7 +31,7 @@
options (@pxref{Common Invocation Options}).
The @command{zebra} daemon must be running before @command{babeld} is
-inovked. Also, if @command{zebra} is restarted then @command{babeld}
+invoked. Also, if @command{zebra} is restarted then @command{babeld}
must be too.
Configuration of @command{babeld} is done in its configuration file
@@ -79,7 +77,7 @@
@end deffn
@deffn {Interface Command} {passive-interface}
-@deffnx {Interface Command} {passive-interface}
+@deffnx {Interface Command} {no passive-interface}
Specifies whether this interface is passive. Note that this is
a little weaker than RIP's notion of passive interface, since Babel
always sends Hello packets, even on passive interfaces.
@@ -111,6 +109,7 @@
@deffnx {Babel Command} {no debug @var{kind}} {}
Enable or disable debugging messages of a given kind. @var{kind} can
be one of @samp{common}, @samp{kernel}, @samp{filter}, @samp{timeout},
-@samp{interface}, @samp{route} or @samp{all}.
+@samp{interface}, @samp{route} or @samp{all}. Note that if you have
+compiled with the NO_DEBUG flag, then these commands aren't available.
@end deffn