Return LSB-compliant exit code from server.sh status

Exit with code 3 when the service is stopped, per LSB init script
guidelines, instead of falling through to exit 0.

Change-Id: I72be8efb3b306c8adb431a328cf3057ea9c11db2

server.sh

diff --git a/server.sh b/server.sh
index 409292e..f3d320f 100755
--- a/server.sh
+++ b/server.sh
@@ -119,6 +119,8 @@
         echo "Server is RUNNING with PID $(cat "$PID_FILE")."
     else
         echo "Server is STOPPED."
+        # according to LSB init script guidelines, return code 3 indicates the service is not running
+        exit 3
     fi
 }