Add missing docs and Changelog-Added line.

Signed-off-by: Rusty Russell <[email protected]>
Changelog-Added: Config: new log level `trace` where we moved the very noisiest `debug` logs.

doc/lightning-cli.1.md

@@ -68,7 +68,7 @@ field without parsing JSON.
 * **--notifications**/**-N**=*LEVEL*
 
   If *LEVEL* is 'none', then never print out notifications.  Otherwise,
-print out notifications of *LEVEL* or above (one of `io`, `debug`,
+print out notifications of *LEVEL* or above (one of `io`, `trace`, `debug`,
 `info` (the default), `unusual` or `broken`: they are prefixed with `#
 `.  (Note: currently not supported with `--commando`).
 

doc/lightningd-config.5.md

@@ -170,7 +170,7 @@ binary.
 
 * **log-level**=*LEVEL*\[:*SUBSYSTEM*\]\[:*PATH*\]
 
-  What log level to print out: options are io, debug, info, unusual,
+  What log level to print out: options are io, trace, debug, info, unusual,
 broken.  If *SUBSYSTEM* is supplied, this sets the logging level
 for any subsystem (or *nodeid*) containing that string. If *PATH* is supplied, it means this log-level filter is only applied to that `log-file`, which is useful for creating logs to capture a specific subsystem.  This option may be specified multiple times.
 Subsystems include: