-`cookie` parameter in `sympa.conf` was obsoleted [\#1091](https://github.com/sympa-community/sympa/issues/1091).
- By a request from the user with English background, the term "blacklist" was replaced with "blocklist". By this change, names of some parameters and configuration file were changed [\#1111](https://github.com/sympa-community/sympa/issues/1111)[\#1144](https://github.com/sympa-community/sympa/issues/1144). This change will be migrated automatically during upgrading process.
- MHonArc resource template `mhonarc-ressources.tt2` was renamed to `mhonarc_rc.tt2` and format of tags in it was changed. Existing customizations will be migrated during upgrading process [\#1095](https://github.com/sympa-community/sympa/pull/1095).
- Remove undocumented backtick syntax in `sympa.conf`[\#1086](https://github.com/sympa-community/sympa/issues/1086).
- Drop support for Perl prior to 5.16 [\#1030](https://github.com/sympa-community/sympa/issues/1030).
**Implemented enhancements:**
**Fixed bugs:**
- Improve labels for personalization control [\#1060](https://github.com/sympa-community/sympa/issues/1060).
-[CVE-2020-26880] root privilege escalation from user sympa by modifying sympa.conf [\#1009](https://github.com/sympa-community/sympa/issues/1009).
- xgettext.pl: Templates shouldn't be processed as Perl source [\#1143](https://github.com/sympa-community/sympa/pull/1143)[\#1149](https://github.com/sympa-community/sympa/pull/1149)
- By a request from the user with English background, the term "blacklist" was replaced with "blocklist". By this change, names of some parameters and configuration file were changed [\#1111](https://github.com/sympa-community/sympa/issues/1111). This change will be migrated automatically during upgrading process.
- MHonArc resource template `mhonarc-ressources.tt2` was renamed to `mhonarc_rc.tt2` and format of tags in it was changed. Existing customizations will be migrated during upgrading process [\#1095](https://github.com/sympa-community/sympa/pull/1095).