TODO: Good enough watchdog implementation now in place

This patch removes the long standing Watchdog daemon from the TODO list.
We now have a bare-bones watchdog service built-in to Finit, with
support for handing over to an external, and possibly more advanced,
using the initctl API.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

TODO.md

@@ -91,44 +91,6 @@ the shell -- that way setting up one-time jobs would not entail
 re-reading `/etc/finit.conf`
 
 
-Watchdog
---------
-
-Support for monitoring the health of the system and its processes.
-
-* Add support for a `/dev/watchdog` built-in to replace both the BusyBox
-  watchdogd and my own refreshed uClinux-dist adaptation,
-  [watchdogd](https://github.com/troglobit/watchdogd)
-* Add a system supervisor (pmon) to optionally reboot the system when a
-  process stops responding, or when a respawn limit has been reached, as
-  well as when system load gets too high.  For details on UNIX loadavg,
-  see http://stackoverflow.com/questions/11987495/linux-proc-loadavg
-  - Default to 0.7 as MAX recommended load before warning and 0.9 reboot
-* API for processes to register with the watchdog, libwdt
-  - Deeper monitoring of a process' main loop by instrumenting
-  - If a process is not heard from within its subscribed period time
-    reboot system or restart process.
-  - Add client libwdt library, inspired by old Westermo API and the
-    [libwdt][] API published in the [Fritz!Box source dump][], take for
-    instance the `fritzbox7170-source-files-04.87-tar.gz` drop and see
-    the `GPL-release_kernel.tgz` in `drivers/char/avm_new/` for the
-    kernel driver, and the `LGPL-GPL-release_target_tools.tgz` in `wdt/`
-    for the userland API.
-  - When a client process (a standard app/daemon instrumented with
-    libwdt calls in its main loop) registers with the watchdog, we raise
-    the RT priority to 98 (just below the kernel watchdog in prio).
-    This to ensure that system monitoring goes before anything else in
-    the system.
-  - Use UNIX domain sockets for communication between daemon and clients
-* Separate `/etc/watchdog.conf` configuration file, or a perhaps
-  support for a more generic `/etc/finit.d/PLUGIN.conf`?
-* Support enable/disable watchdog features:
-  - Supervise processes,
-  - CPU loadavg,
-  - Watch for file descriptor leaks,
-  - etc.
-
-
 Documentation
 -------------