I. Upgrade Information
~~~~~~~~~~~~~~~~~~~~~~
+Differences to version 19.x
+
+- Starting with ngIRCd 20, users can "cloak" their hostname only when the
+ configuration variable "CloakHostModeX" (introduced in 19.2) is set.
+ Otherwise, only IRC opertators, other servers, and services are allowed to
+ set mode +x. This prevents regular users from changing their hostmask to
+ the name of the IRC server itself, which confused quite a few people ;-)
+
Differences to version 17
- Support for ZeroConf/Bonjour/Rendezvous service registration has been