Release 1.6.10

• IMAP: Partial support for ANNOTATE-EXPERIMENT-1 extension (RFC 5257)
• OAuth: Support standard authentication with short-living password received with OIDC token (#9530)
• Fix PHP warnings (#9616, #9611)
• Fix whitespace handling in vCard line continuation (#9637)
• Fix current script state after initial scripts creation in managesieve_kolab_master mode
• Fix rcube_imap::get_vendor() result (and PHP warning) on Zimbra server (#9650)
• Fix regression causing inline SVG images to be missing in mail preview (#9644)
• Fix plugin "virtuser_file" to handle backward slashes in username (#9668)
• Fix PHP fatal error when parsing some malformed BODYSTRUCTURE responses (#9689)
• Fix insert_or_update() and reading database server config on PostgreSQL (#9710)
• Fix Oauth issues with use_secure_urls=true (#9722)
• Fix handling of binary mail parts (e.g. PDF) encoded with quoted-printable (#9728)
• Fix links in comments and config to https:// where available (#9759, #9756)
• Fix decoding of attachment names encoded using both RFC2231 and RFC2047 standards (#9725)