Features:

• announce status to systemd via sd_notify (using a simple custom implementation) [!143]

Bug fixes:

• properly update global security level status [#131 via !141]
• adapt to systemd 240 not sending bind/unbind uevents [#133 via !145]
• fix compilation on musl [#126 via !140]
• daemon: use g_unix_signal_source… to catch signals [#127, #129 via !138]

Improvements

• precondition checks cleanup and completion [#124 via !139]
• error cleanup [#125, !142]
• fix some leaks and issues uncovered by coverity [!144]