main
userdbctl: enable ssh-authorized-keys logic by default
meson: drop libdl, threads, and librt dependencies
copy: drop COPY_REFLINK
sd-event: use CLOCK_BOOTTIME for rate limits
Rename basic-forward.h, sd-forward.h, and shared-forward.h to forward.h
tree-wide: Remove unnecessary SIGCHLD blocking
user-record-nss: preserve valid nss lookup aliases in records