PublicIp: add option to set public IP server URL

src/data/config_user.txt

@@ -151,6 +151,12 @@
 # Default is "-"
 #--separator-string -
 
+# Public IP URL option:
+# Sets the URL of public IP detection server to be used.
+# Only HTTP protocol is supported, and the value should not contain "http://" prefix.
+# Default is "ipinfo.io/ip".
+#--public-ip-url "ipinfo.io/ip"
+
 # Public IP timeout option:
 # Sets the time to wait for the public ip server to respond.
 # Must be a positive integer.

src/data/help.txt

@@ -103,6 +103,7 @@ Module specific options:
     --localip-show-loop <?value>: Show loop back addresses (127.0.0.1) in local ip module. Default is false
     --localip-name-prefix <str>:  Show ips with given name prefix only. Default is empty
     --public-ip-timeout:          Time in milliseconds to wait for the public ip server to respond. Default is disabled (0)
+    --public-ip-url:              The URL of public IP detection server to be used.
     --player-name:                The name of the player to use
     --gl <value>:                 Sets the opengl context creation library to use. Must be auto, egl, glx or osmesa. Default is auto