[doc] Removes documentation of nonexistant option.

Expansion of Ubuntu quagga-0.99.11-1 30_doc__ospfd.8__nolog.dpatch
diff --git a/doc/ospfd.8 b/doc/ospfd.8
index 63f8c69..8c819cf 100644
--- a/doc/ospfd.8
+++ b/doc/ospfd.8
@@ -52,9 +52,6 @@
 \fB\fIpid-file\fR.  The init system uses the recorded PID to stop or
 restart ospfd.  The likely default is \fB\fI/var/run/ospfd.pid\fR.
 .TP
-\fB\-l\fR, \fB\-\-log_mode\fR
-Turn verbose logging on.
-.TP
 \fB\-P\fR, \fB\-\-vty_port \fR\fIport-number\fR 
 Specify the port that the ospfd VTY will listen on. This defaults to
 2604, as specified in \fB\fI/etc/services\fR.
diff --git a/doc/ripngd.8 b/doc/ripngd.8
index d9d8201..6e63dc2 100644
--- a/doc/ripngd.8
+++ b/doc/ripngd.8
@@ -53,9 +53,6 @@
 \fB\fIpid-file\fR.  The init system uses the recorded PID to stop or
 restart ripngd.  The likely default is \fB\fI/var/run/ripngd.pid\fR.
 .TP
-\fB\-l\fR, \fB\-\-log_mode\fR 
-Turn verbose logging on.
-.TP
 \fB\-P\fR, \fB\-\-vty_port \fR\fIport-number\fR 
 Specify the port that the ripngd VTY will listen on. This defaults to
 2603, as specified in \fB\fI/etc/services\fR.
diff --git a/doc/zebra.8 b/doc/zebra.8
index 38ccf1a..9399be0 100644
--- a/doc/zebra.8
+++ b/doc/zebra.8
@@ -60,9 +60,6 @@
 \fB\-k\fR, \fB\-\-keep_kernel\fR
 On startup, don't delete self inserted routes.
 .TP
-\fB\-l\fR, \fB\-\-log_mode\fR
-Turn verbose logging on.
-.TP
 \fB\-P\fR, \fB\-\-vty_port \fR\fIport-number\fR 
 Specify the port that the zebra VTY will listen on. This defaults to
 2602, as specified in \fB\fI/etc/services\fR.