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https://sourceforge.net/p/dar/mailman/message/37106183/

Add driver for DS1307 and compatible RTCs (including DS3231) to kernel.
This driver supports the majority of 3rd party RTCs addons available for
Raspberry Pis.

Having the driver built into the kernel (rather than loaded by initramfs)
ensures that the kernel will set the system clock from the RTC very early
during boot, so preventing OpenRC "clock skew" messages from appearing.

Resolves #11889.

Adds support for managing wireguard devices.  Closes: !9874

To be able to offer super minimalistic systems, or really just early
boot, klibc offers a limited subsect of utilities. Just enough to bring
up a rootfs. It is like a tiny busybox.

This could also help in the future where people want to have super
minimalistic containers (FROM scratch) but still want to offer some
basics (sh and maybe slightly more) to help with CI runners.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>