Stop mounting efivarfs read-only

We do not need to do this any longer since all supported linux kernels
make efivarfs immutable and the tools that manipulate it are aware of
this feature.

This fixes https://github.com/openrc/openrc/issues/238.

NEWS.md

@@ -11,6 +11,13 @@ The only place I know that this was used was Gentoo Baselayout 1.x, so
 it shouldn't affect anyone since baselayout-1 has been dead for a few
 years.
 
+Since all supported Linux kernel versions now make efivarfs immutable
+and all of the tools that access efivarfs are aware of this, we no
+longer mount efivarfs read-only. See the following github issue for more
+information:
+
+https://github.com/openrc/openrc/issues/238
+
 ## OpenRC 0.37
 
 start-stop-daemon now supports logging stdout and stderr of daemons to

init.d/sysfs.in

@@ -101,7 +101,7 @@ mount_misc()
 	if [ -d /sys/firmware/efi/efivars ] &&
 		! mountinfo -q /sys/firmware/efi/efivars; then
 		ebegin "Mounting efivarfs filesystem"
-		mount -n -t efivarfs -o ro \
+		mount -n -t efivarfs -o ${sysfs_opts} \
 			efivarfs /sys/firmware/efi/efivars 2> /dev/null
 		eend 0
 	fi