docs: update changelog and add note about trusted domains

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

docs/changelog.md

@@ -46,6 +46,7 @@ The format is based on [Keep a Changelog].
 - **klippy_connection**:  Fixed a race condition that can result in
   skipped subscription updates.
 - **configheler**: Fixed inline comment parsing.
+- **authorization**: Fixed blocking call to `socket.getfqdn()`
 
 ### Changed
 

docs/configuration.md

@@ -469,8 +469,8 @@ trusted_clients:
 #   must be expressed in CIDR notation (see http://ip.sb/cidr for more info).
 #   For example, an entry of 192.168.1.0/24 will authorize IPs in the range of
 #   192.168.1.1 - 192.168.1.254.  Note that when specifying IPv4 ranges the
-#   last segment of the ip address must be 0. The default is no clients are
-#   trusted.
+#   last segment of the ip address must be 0. The default is no IPs or
+#   domains are trusted.
 cors_domains:
   http://klipper-printer.local
   http://second-printer.local:7125
@@ -498,6 +498,14 @@ default_source: moonraker
 #   "moonraker"  The default is "moonraker".
 ```
 
+!!! Tip
+    When configuring the `trusted_clients` option it is generally recommended
+    to stick with IP ranges and avoid including domain names.  When attempting to
+    authenticate a request against a domain name Moonraker must perform a DNS
+    lookup. If the DNS service is not available then authentication will fail
+    and an error will be returned.  In addition, DNS lookups will introduce delay
+    in the response.
+
 ### `[ldap]`
 
 The `ldap` module may be used by `[authorization]` to perform user