void: Update installation instruction, recommend manual edit of grub

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

contrib/void/README.md

@@ -23,19 +23,33 @@ More on that below.
 
     void:~/finit# ./contrib/void/install.sh
 
-The install script is non-destructive by default, you have to answer
+The install script is (supposed to be) non-destructive by default, you
-*Yes* twice to set up Finit as the system default init.  Pay close
+have to answer *Yes* twice to set up Finit as the system default init.
-attention to the last question:
+Pay close attention to the last question:
 
     *** Install Finit as the system default Init (y/N)?
 
 If you answer `No`, simply by pressing enter, you can change the symlink
-yourself later on, to point to `finit` instead of `/bin/busybox`:
+yourself later on, to point to `finit` instead of `runit`:
 
     void:~/finit# cd /sbin
     void:/sbin# rm init
     void:/sbin# ln -s finit init
 
+Another option is to change the Grub defaults, in `/etc/default/grub`:
+
+    #GRUB_CMDLINE_LINUX_DEFAULT="loglevel=4 slub_debug=P page_poison=1"
+    GRUB_CMDLINE_LINUX_DEFAULT="loglevel=4 init=/sbin/finit"
+
+Alternatively, you can simply modify the default Grub entry at boot, or
+set up an alternative Grub entry to include:
+
+    linux /boot/vmlinuz-X.YY.Z ... init=/sbin/finit
+
+If you modify a Grub configuration file, remember to run:
+
+    update-grub
+
 Before rebooting, make sure to set up a [/etc/finit.conf](finit.conf),
 and [/etc/finit.d/](finit.d/) for your services.  Samples are included
 in this directory.  Notice the symlinks in `/etc/finit.d/`, which can be

contrib/void/install.sh

@@ -44,14 +44,6 @@ if [ "x$yorn" = "xy" -o "x$yorn" = "xY" ]; then
 	ln -s finit init
     fi
 
-    echo "*** Setting up a GRUB boot entry ..."
-    MENU=`grep gnu-linux /boot/grub/grub.cfg |head -1 |sed "s/menuentry '\([^']*\).*/\1/"`
-    TYPE=`grep gnu-linux /boot/grub/grub.cfg |head -1 |sed "s/.*' --class \([a-z]*\).*/\1/"`
-    BOOT=`grep set=root /boot/grub/grub.cfg |head -1 |sed 's/.* \([a-f0-9]*-[a-f0-9]*-[a-f0-9]*-[a-f0-9]*-[a-f0-9]*\).*/\1/'`
-    ROOT=`grep root=UUID /boot/grub/grub.cfg |head -1 |sed 's/.*UUID=\([a-f0-9]*-[a-f0-9]*-[a-f0-9]*-[a-f0-9]*-[a-f0-9]*\).*/\1/'`
-    cat grub.d/40_custom | sed "s,\$BOOT,$BOOT,;s,\$ROOT,$ROOT,;s,\$TYPE,$TYPE,;s,\$MENU,$MENU," >/etc/grub.d/40_custom
-    update-grub
-
     echo "*** Done"
     echo
 else