b53f364c26 test: install af_packet kernel module on openSUSE
86b7521a3c shared/wall: use logind if build without utmp support
65aac5858f errno-util: allow ERRNO_IS_* to accept types wider than int
8f93b89db4 basic/errno-util: add wrappers which only accept negative errno
1b815b3e76 Introduce RET_GATHER and use it in src/shared/
OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=1469
