InspIRCd v4.10.0 is now available, download it from the releases page.
The most notable changes in this release are:
Added extended ban d: (redirect) to the redirect module.
Added support for the IRCv3 ACCOUNTEXTBAN ISupport token.
Added support for the IRCv3 no-implicit-names specification to the ircv3 module.
Added support for the IRCv3 UTF8ONLY specification.
Added support for validating extended bans before they are set.
Added the sharebans module which allows bans to be shared between channels.
No breaking configuration changes have been made since the v4.0.0 release. Please consult the list of breaking changes if you are upgrading from v3.
The full change log can be found on the docs site or on GitHub.