Use .local/state/syncthing (#17)

* Use .local/state/syncthing

If SYNCTHING_CONFIG_FILE is not set and default config not found, look
for config.xml in localstate directory:

    SYNCTHING_DEFAULT_STATEDIR="$HOME/.local/state/syncthing"

At least in my environment (manjaro linux) this is where a working
config.xml is located by default.

* Make sure `SYNCTHING_CONFIG_FILE` is never empty

---------

Co-authored-by: Sergio Livi <me@serl.it>

Author: sstark

syncthing-quick-status.sh

@@ -15,8 +15,10 @@ done
 
 if [[ -z $SYNCTHING_API_KEY ]]; then
 	SYNCTHING_DEFAULT_CONFIG_FILE="$HOME/.config/syncthing/config.xml"
+	if [[ ! -r "$SYNCTHING_DEFAULT_CONFIG_FILE" ]]; then
+		SYNCTHING_DEFAULT_CONFIG_FILE="$HOME/.local/state/syncthing/config.xml"
+ 	fi
 	if [[ $(uname) = Darwin ]]; then
-		# config.xml is stored in a different path in MacOS:
 		SYNCTHING_DEFAULT_CONFIG_FILE="$HOME/Library/Application Support/Syncthing/config.xml"
 	fi
 	: "${SYNCTHING_CONFIG_FILE:="$SYNCTHING_DEFAULT_CONFIG_FILE"}"