changed default service for myextapi

doc/profile.conf.example

@@ -148,9 +148,11 @@ PAGER=less
 # Values accepted: 1/0, true/false, yes/no, on/off.
 #DWL_DEFAULT_RESUME=0
 
-# myextip: API endpoint for external IP lookup.
-# Alternatives: https://ipinfo.io/json, https://ip-api.com/json/
-#MYEXTIP_DEFAULT_URL=https://ip-api.com/json/
+# myextip: HTTPS JSON API used for the external IP lookup (default below).
+# Also supported: https://ipwho.is/ (more detailed: ISP and AS kept apart,
+# full country name). ip-api.com is not recommended: its free tier is HTTP only
+# and https://ip-api.com/ answers 403.
+#MYEXTIP_DEFAULT_URL=https://ipinfo.io/json
 
 # ==============================================================================
 [packages]