Update README.

README.md

@@ -75,6 +75,15 @@ mwtchahrd -i <IP> -p <PORT> [-c <CHANNEL>] [-d] [-u]
 - `-f, --freq <FREQ>`                 
   Spotting frequency [default: 14105000].
   
+- `-y, --my_lat <MY_LAT>`                 
+  Spotter latitude, DD.dddd.
+  
+- `-x, --my_lon <MY_LON>`                 
+  Spotter longitude, DD.dddd.
+
+- `-t, --filter <CALL-SSID,CALL-SSID,...>`                 
+  Filter out spots from these callsign-UUID combinations (self spots, for example), comma-separated. This is not regex, just full matches.
+
 - `-h, --help`                         
   Print help.