Standard fenrir backgrounding and -d flags restored.

README.md

@@ -58,6 +58,11 @@ From a Linux text console:
 sudo ./fenrir
 ```
 
+Console mode starts in the background by default. Use `sudo ./fenrir -f` to
+keep it in the foreground, including when running under a service manager.
+The launcher waits for startup and reports initialization errors. Use
+`--debug-file PATH` to keep diagnostics after it detaches.
+
 Console mode needs access to the console devices, keyboard event devices, and
 `/dev/uinput`. Run only one reader on the same console. Fenrir releases keyboard
 input on graphical virtual terminals and on text consoles listed in
@@ -212,7 +217,8 @@ requests can also be enabled separately in the `[remote]` section.
 Run `./fenrir --help` for all options. Useful options include `--config`,
 `--keyboard-layout`, `--punctuation-profile`, `--speech-driver`, `--speech-rate`,
 `--speech-module`, `--input-device`, and `--debug-file`. `--version` prints the
-version and release channel. Fenrir runs in the foreground.
+version and release channel. Console mode runs in the background unless `-f`
+is given; `-x` always runs in the foreground.
 
 ## Localization