Roundcube Webmail 1.6-rc

This is the release candidate for the next major version 1.6 of Roundcube webmail.

It includes a small number of improvements and fixes in comparison to 1.6-beta release.

We believe it is production ready, but we recommend to test it on a separate environment.
And don't forget to backup your data before installing it.

CHANGELOG

• Update to jQuery-UI 1.13.1 (#8455)
• Added possibility to make the logo image a link via the 'skin_logo' option (#8501)
• Use navigator.pdfViewerEnabled for PDF viewer detection
• Remove use of unreliable charset detection (#8344)
• Don't list images attached to multipart/related part as attachments (#7184)
• Password: Add support for ssha256 algorithm (#8459)
• Fix so unix:// URI is supported in various host spec. options again (#8468)
• Fix slow loading of long HTML content into the HTML editor (#8108)
• Fix bug where SMTP password didn't work if it contained '%p' (#8435)
• Enigma: Fix initial synchronization of private keys
• Enigma: Fix double quoted-printable encoding of pgp-signed messages with no attachments (#8413)
• Fix handling of message/rfc822 parts that are small and are multipart structures with a single part (#8458)
• Fix bug where session could time out if DB and PHP timezone were different (#8303)
• Fix bug where DSN flag state wasn't stored with a draft (#8371)
• Fix broken encoding of HTML content encapsulated in a RTF attachment (#8444)
• Fix problem with aria-hidden=true on toolbar menus in the Elastic skin (#8517)
• Fix so links (e.g. www.some.page or http://some.page) are not considered mispellings (#8527)
• Fix bug where title tag content was displayed in the body if it contained HTML tags (#8540)