extend example

config

@@ -14,7 +14,8 @@
 # CalDAV server hostnames separated by a comma
 # IPv4 syntax: address:port
 # IPv6 syntax: [address]:port
-# For example: 0.0.0.0:9999, [::]:9999
+# Hostname syntax (using "getaddrinfo" to resolve to IPv4/IPv6 adress(es)): hostname:port
+# For example: 0.0.0.0:9999, [::]:9999, localhost:9999
 #hosts = localhost:5232
 
 # Max parallel connections