Update TODO

TODO

-- Put more information in the token mail (registry), such as:
+- We have forked babeld for several changes. We'd like all our patches to be
+  merged upstream. See https://lab.nexedi.com/nexedi/babeld
 
-  - the ip address of the network being built
-  - the creator of the network ( add option in registry ? )
+- Filter non-routable IPs. Add an option not to do it.
 
-- Babel limitations:
+- More runtime configuration changes (i.e. without complete restart).
 
-  - Babel must be able to set source address on routes it installed. Otherwise,
-    a wrong IP will be selected if managed interfaces already have several
-    public IPv6. If there's only one interface like this, a workaround is to
-    use --main-interface option on it.
+- Several subprocesses like babeld are started at the beginning and never
+  watched, because they should never exit. Their management must be moved to
+  the main loop, to restart them in case of failure or configuration change.
 
-- Filter non-routable IPs. Add an option not to do it.
+- Put more information in the token mail (registry), such as:
 
-- Abort in case of import child process failure (babel, openvpn server,
-  openvpn client if run with --client).
+  - the ip address of the network being built
+  - the creator of the network ( add option in registry ? )
 
 - registry: add '--home PATH' command line option so that / display an HTML
   page from PATH (use new str.format for templating)