feature: the package installs the Router Manager, which is no longer a package of its own.

docs/logs.md

@@ -0,0 +1,26 @@
+# Logs
+
+The last lines of the router's logs.
+
+## Sub-tabs
+
+- **Journal:** the systemd journal of one of the router's units, or of all units.
+- **Files:** a log file the router lists in its setting `web.log_files`. Files are added on the
+  router as root:
+
+  ```sh
+  vpn-config-edit set web.log_files /var/log/syslog,/var/log/auth.log
+  ```
+
+## Controls
+
+- **Unit** or **File:** the log shown.
+- **Lines:** 100, 200, 500 or 1000 of the last lines; the router answers at most 1000 at a time,
+  and reads at most the last MiB of a file.
+- **Follow:** reads the log every 2 seconds and keeps the view at its last line, as `tail -f`
+  does. Refresh is off meanwhile.
+- **Refresh:** reads the log again. A log is also read when the unit, the file or the number of
+  lines changes.
+
+Older lines stay on the router: `journalctl` and the files themselves, over SSH or the
+[Shell](shell.md).