babeld: add page (#9931)

Signed-off-by: Marek Küthe <m.k@mk16.de>

pages/common/babeld.md

@@ -0,0 +1,24 @@
+# babeld
+
+> Routing daemon for Babel which uses firewall-style filters.
+> More information: <https://www.irif.fr/~jch/software/babel/babeld.html>.
+
+- Start babeld with a specific configuration file:
+
+`babeld -c {{path/to/babeld.conf}}`
+
+- Start babeld with multiple configuration files (read in order):
+
+`babeld -c {{path/to/ports.conf}} -c {{path/to/filters.conf}} -c {{path/to/interfaces.conf}}`
+
+- Start babeld and daemonise afterwards:
+
+`babeld -D`
+
+- Start babeld and pass a configuration command:
+
+`babeld -C {{'redistribute metric 256'}}`
+
+- Start babeld and specify on which interfaces to operate:
+
+`babeld {{eth0}} {{eth1}} {{wlan0}}`