Document channel configuration.

babeld.man

@@ -173,11 +173,6 @@ wireless interfaces; on wired interfaces, the default depends on the
 .B \-s
 flag.
 .TP
-.BR faraway " {" true | false }
-This specifies whether the network is "far away", in the sense that
-networks behind it don't interfere with networks in front of it.  By
-default, networks are not far away.
-.TP
 .BI rxcost " cost"
 This defines the cost of receiving frames on the given interface under
 ideal conditions (no packet loss); how this relates to the actual cost used
@@ -185,6 +180,23 @@ for computing metrics of routes going through this interface depends on
 whether link quality estimation is being done.  The default is 96 for wired
 interfaces, and 256 for wireless ones.
 .TP
+.BI channel " channel"
+Sets the channel for this interface.  The value
+.I channel
+can be either an integer, or one of the strings
+.B interfering
+or
+.BR noninterfering .
+The default is to autodetect the channel number for wireless interfaces,
+and
+.B noninterfering
+for wired interfaces.
+.TP
+.BR faraway " {" true | false }
+This specifies whether the network is "far away", in the sense that
+networks behind it don't interfere with networks in front of it.  By
+default, networks are not far away.
+.TP
 .BI hello\-interval " interval"
 This defines the interval between hello packets sent on this interface.
 The default is specified with the