package/inadyn: update inadyn.conf example

- Comment out iface setting, usually not what you want
 - Update DynDNS example, show use of multiple hostnames
 - Add FreeDNS sample config, free and stable service
 - Add link to syntax and examples

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/inadyn/inadyn.conf

@@ -1,11 +1,26 @@
-# Basic configuration file for inadyn
+# Example /etc/inadyn.conf
 #
-# /etc/inadyn.conf
-iface    = eth0
+# Remember to change this file to match your provider and credentials
+# Username and password can be included from another file.  For more
+# info, see https://man.troglobit.com/man5/inadyn.conf.5.html
+
+# Use IP address of interface instead of external checkip server.
+# Useful when you want to register internal IP addresses
+#iface    = eth0
+
+# IP address change check interval
 period   = 300
 
-provider default@dyndns.org {
+# Remove of change to match your Dyn account
+provider dyndns.org {
 	username    = test
 	password    = test
-	hostname    = test
+	hostname    = { "my.example.com", "other.example.org" }
+}
+
+# Remove or change to match your FreeDNS account
+provider freedns {
+     username   = lower-case-username
+     password   = case-sensitive-pwd
+     hostname   = some.example.com
 }