[5530a] Documentation for dhcp6_srv_configured added.

src/bin/dhcp6/dhcp6_hooks.dox

@@ -46,6 +46,23 @@ packet processing, but the exact order depends on the actual processing. Hook po
 that are not specific to packet processing (e.g. lease expiration) will be added
 to the end of this list.
 
+ @subsection dhcp6HooksDhcpv4SrvConfigured dhcp6_srv_configured
+ - @b Arguments:
+   - name: @b io_context, type: isc::asiolink::IOServicePtr, direction: <b>in</b>
+   - name: @b json_config, type: isc::data::ConstElementPtr, direction: <b>in</b>
+   - name: @b server_config, type: isc::dhcp::SrvConfigPtr, direction: <b>in</b>
+
+ - @b Description: this callout is executed when the server has completed
+   its (re)configuration. The server provides received and parsed configuration
+   structures to the hook library. It also provides a pointer to the IOService
+   object which is used by the server to run asynchronous operations. The hooks
+   libraries can use this IOService object to schedule asynchronous tasks which
+   are triggered by the DHCP server's main loop. The hook library should hold the
+   provided pointer until the library is unloaded.
+
+ - <b>Next step status</b>: Status codes retured by the callouts installed on
+   this hook point are ignored.
+
  @subsection dhcpv6HooksBuffer6Receive buffer6_receive
 
  - @b Arguments: