Radicale

* Add: option [auth] dovecot_connection_type / dovecot_host / dovecot_port
* Add: option [auth] type imap by code migration from https://github.com/Unrud/RadicaleIMAP/

* Add: option [auth] cache_logins/cache_successful_logins_expiry/cache_failed_logins for caching logins
* Improve: [auth] log used hash method and result on debug for htpasswd authentication
* Improve: [auth] htpasswd file now read and verified on start
* Add: option [auth] htpasswd_cache to automatic re-read triggered on change (mtime or size) instead reading on each request
* Improve: [auth] htpasswd: module 'bcrypt' is no longer mandatory in case digest method not used in file
* Improve: [auth] successful/failed login logs now type and whether result was taken from cache
* Improve: [auth] constant execution time for failed logins independent of external backend or by htpasswd used digest method
* Drop: support for Python 3.8
* Add: option [auth] ldap_user_attribute
* Add: option [auth] ldap_groups_attribute as a more flexible replacement of removed ldap_load_groups

* Add: display mtime_ns precision of storage folder with condition warning if too less
* Improve: disable fsync during storage verification
* Improve: suppress duplicate log lines on startup
* Contrib: logwatch config and script
* Improve: log precondition result on PUT request

* Fix: debug logging in rights/from_file
* Add: option [storage] use_cache_subfolder_for_item for storing 'item' cache outside collection-root
* Fix: ignore empty RRULESET in item
* Add: option [storage] filesystem_cache_folder for defining location of cache outside collection-root
* Add: option [storage] use_cache_subfolder_for_history for storing 'history' cache outside collection-root
* Add: option [storage] use_cache_subfolder_for_synctoken for storing 'sync-token' cache outside collection-root
* Add: option [storage] folder_umask for configuration of umask (overwrite system-default)
* Fix: also remove 'item' from cache on delete
* Improve: avoid automatically invalid cache on upgrade in case no change on cache structure
* Improve: log important module versions on startup
* Improve: auth.ldap config shown on startup, terminate in case no password is supplied for bind user
* Add: option [auth] uc_username for uppercase conversion (similar to existing lc_username)
* Add: option [logging] storage_cache_action_on_debug for conditional logging
* Fix: set PRODID on collection upload (instead of vobject is inserting default one)
* Add: option [storage] use_mtime_and_size_for_item_cache for changing cache lookup from SHA256 to mtime_ns + size
* Fix: buggy cache file content creation on collection upload

* Add: option [auth] type=dovecot
* Enhancement: log content in case of multiple main components error
* Fix: expand does not take timezones into account
* Fix: expand does not support overridden recurring events
* Fix: expand does not honor start and end times
* Add: option [server] protocol + ciphersuite for optional restrictions on SSL socket
* Enhancement: [storage] hook documentation, logging, error behavior (no longer throwing an exception)

* Adjustment: option [auth] htpasswd_encryption change default from "md5" to "autodetect"
* Add: option [auth] type=ldap with (group) rights management via LDAP/LDAPS
* Enhancement: permit_delete_collection can be now controlled also per collection by rights 'D' or 'd'
* Add: option [rights] permit_overwrite_collection (default=True) which can be also controlled per collection by rights 'O' or 'o'
* Fix: only expand VEVENT on REPORT request containing 'expand'
* Adjustment: switch from setup.py to pyproject.toml (but keep files for legacy packaging)
* Adjustment: 'rights' file is now read only during startup
* Cleanup: Python 3.7 leftovers