Update reference configuration file in the docs (#480)

To prevent the warning:

> net prefix tcp is deprecated, using tcp+udp as default fallback

docs/config.yml

@@ -33,8 +33,8 @@ conditional:
   rewrite:
     example.com: fritz.box
   mapping:
-    fritz.box: udp:192.168.178.1
-    lan.net: udp:192.168.178.1,udp:192.168.178.2
+    fritz.box: 192.168.178.1
+    lan.net: 192.168.178.1,192.168.178.2
 
 # optional: use black and white lists to block queries (for example ads, trackers, adult pages etc.)
 blocking:
@@ -126,7 +126,7 @@ caching:
 # optional: configuration of client name resolution
 clientLookup:
   # optional: this DNS resolver will be used to perform reverse DNS lookup (typically local router)
-  upstream: udp:192.168.178.1
+  upstream: 192.168.178.1
   # optional: some routers return multiple names for client (host name and user defined name). Define which single name should be used.
   # Example: take second name if present, if not take first name
   singleNameOrder:
@@ -183,7 +183,7 @@ httpPort: 4000
 #certFile: server.crt
 #keyFile: server.key
 # optional: use this DNS server to resolve blacklist urls and upstream DNS servers. Useful if no DNS resolver is configured and blocky needs to resolve a host name. Format net:IP:port, net must be udp or tcp
-bootstrapDns: tcp:1.1.1.1
+bootstrapDns: tcp+udp:1.1.1.1
 # optional: Drop all AAAA query if set to true. Default: false
 disableIPv6: false
 # optional: if path defined, use this file for query resolution (A, AAAA and rDNS). Default: empty