+new format. Some prominent changes follow.
+
+The old contents of H: lines have been merged into the Connect block
+that describes the peer server(s) that should be allowed to hub.
+
+Two default virtual host addresses may be specified, one for IPv4
+sockets and one for IPv6 sockets.
+
+Nickname jupes have their own blocks, and do not share structure with
+UWorld server declarations.
+
+Operator connection classes and individual operator blocks may be
+assigned privileges, rather than having them controlled globally.
+Because of this, the feature settings that controlled the privileges
+globally have been removed.
+
+The maximum number of clients allowed per IP may be set in a Client
+block (the equivalent of C: lines).
+
+New feature settings (see doc/readme.features for explanations):
+ANNOUNCE_INVITES, HIS_STATS_L, HIS_STATS_a, HIS_STATS_R,
+LOCAL_CHANNELS, TOPIC_BURST.
+
+Deleted features, since they had no effect even in 2.10.11: AUTOHIDE,
+HIS_DESYNCS, TIMESEC.
+
+Deleted features since they are now controlled by other configuration
+entries: VIRTUAL_HOST, oper and locop privilege features.