Updated Background decoding (markdown)

Background-decoding.md

@@ -38,22 +38,40 @@ sdrs = {
             "40m": { ... removed for clarity ... },
             "80m": { ... removed for clarity ... },
         },
-        "schedule": {
-            "2100-0400": "80m",
-            "0400-0900": "40m",
-            "0900-1500": "20m",
-            "1500-2100": "40m",
+        "scheduler": {
+            "type": "static",
+            "schedule": {
+                "2100-0400": "80m",
+                "0400-0900": "40m",
+                "0900-1500": "20m",
+                "1500-2100": "40m",
+            },
         },
     },
 }
 ```
 
-This SDR device has been set up to listen on the 80m profile from 9pm to 4am, on 20m from 9am to 3pm, and on 40m on the remaining slots inbetween.
+This SDR device has been set up with a static scheduler to listen on the 80m profile from 9pm to 4am, on 20m from 9am to 3pm, and on 40m on the remaining slots inbetween.
 
 You can have as many schedule items as you wish, you can even leave "idle" times inbetween in which the SDR is shut down (unless of course a user is using it). You can also set your receiver to be running on the same profile all day long if you set the scheduel item to `0000-0000`.
 
 Please note: The schedule format is very specific. You can only specify start end end time in four digits each, separated by a `-`. You can not specify days, weekdays, or seconds.
 
+There is also a "daylight" scheduler available, that will calculate sunrise / sunset times and schedule your device accordingly. You can optionally also configure a "greyline" profile for the transition period (+/- 1 hour from sunset / sunrise). Here's a small example snippet on how to configure it:
+
+```
+"scheduler": {
+    "type": "daylight",
+    "schedule": {
+        "night": "80m",
+        "day": "20m",
+        "greyline": "40m",
+    },
+},
+```
+
+**Please Note**: with the introduction of the daylight scheduler (January 2020), the scheduler config format has changed to allow for different scheduler types. The old config format is still supported for backwards compatibility, but at the same time deprecated. Please feel encouraged to switch to the new format.
+
 # Reporting
 
 Once your receiver is decoding any digital signals, you may as well share your spots with some networks so the transmitting station can find out about his range.