* fix compilation with gcc-10, which defaults to -fno-common (#288)
* reduce number of open() operations on state file (#282)
* validate user/group given to the su directive early (#276)
* add hardening options to systemd unit file in examples (#274, #291)
* fix crash of logrotate on invalid configuration with include (#271)
* fix heap buffer overflow on too long logfile extension (#270)
OBS-URL: https://build.opensuse.org/package/show/Base:System/logrotate?expand=0&rev=81
