- added support for IPv6 (not tested due to lack of IPv6 network)

- new "Prefer IPv6" config option
- IPv6 address is allowed in DNS Server and Outbound Proxy
- added log_level config file variable
- added Google IPv6 DNS server address

app/src/main/kotlin/com/tutpro/baresip/Utils.kt

@@ -244,11 +244,6 @@ object Utils {
         return checkDomain(userDomain[1]) || checkIP(userDomain[1])
     }
 
-    fun checkOutboundUri(uri: String): Boolean {
-        if (!uri.startsWith("sip:")) return false
-        return checkHostPortParams(uri.substring(4))
-    }
-
     fun checkPrintAscii(s: String): Boolean {
         if (s == "") return true
         return Regex("^[ -~]*\$").matches(s)