Delete all GPT partitions at once. (Suggested by Andrey V. Elsukov <bu7cher@yandex.ru>)

Fix amd64 merge script.

tools/tools/nanobsd/rescue/Files/root/GPT4ZFS_Create.sh

@@ -25,10 +25,7 @@ shift; while getopts :s:z: arg; do case ${arg} in
   #?) exerr ${usage};;                                                                                                      
 esac; done; shift $(( ${OPTIND} - 1 ))                                                                                                
  
-gpart delete -i 3 $dsk
-gpart delete -i 2 $dsk
-gpart delete -i 1 $dsk
-gpart destroy $dsk
+gpart destroy -F $dsk
 gpart create -s gpt $dsk
 
 # Boot

tools/tools/nanobsd/rescue/merge.sh

@@ -7,5 +7,12 @@ D2="/usr/obj/nanobsd.rescue_amd64"
 MD=`mdconfig -a -t vnode -f ${D1}/_.disk.full`
 
 dd if=${D2}/_.disk.image of=/dev/${MD}s2 bs=128k
+tunefs -L rescues2a /dev/${MD}s2a
+mount /dev/${MD}s2a ${D1}/_.mnt
+
+sed -i "" -e 's/rescues1/rescues2/' ${D1}/_.mnt/conf/base/etc/fstab
+sed -i "" -e 's/rescues1/rescues2/' ${D1}/_.mnt/etc/fstab
+
+umount ${D1}/_.mnt
 
 mdconfig -d -u ${MD}