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# Cyrus IMAP 2.4.17-caldav-beta4 Release Notes

Changes to the Cyrus IMAP Server since 2.4.17-caldav-beta3

- Plugged leaked memory found by Valgrind
- Rewrote list_feeds() to not use memmem()
- OPTIONS method can be used without authentication
- Better handling of Connection:keep-alive
- Added httpallowedurls option

Cyrus IMAP 2.4-caldav Releases