illumos gate

We only should update VBR (volume boot record or partition boot record) when we also update stage2 (gptzfsboot). This is because we do store the stage2 block count in vbr and if it should happen that block count does shrink, the VBR code will read less blocks from stage2 than we actually have.

Also adjust newlines to get more consistent screen output.

Testing done:

unpatched version:

root@test:~# installboot /dev/rdsk/c3t0d0s1

Bootblock version installed on /dev/rdsk/c3t0d0s1 is more recent or identical to
/boot/gptzfsboot
Use -F to override or install without the -u option.

/boot/pmbr will be written to /dev/rdsk/c3t0d0s1
stage1 written to slice 1 sector 0 (abs 524544)

Bootblock version installed on /dev/rdsk/c3t0d0s0 is more recent or identical to
/boot/loader64.efi
Use -F to override or install without the -u option.

Bootblock version installed on /dev/rdsk/c3t0d0s0 is more recent or identical to
/boot/loader32.efi
Use -F to override or install without the -u option.

/boot/pmbr is newer than one in /dev/rdsk/c3t0d0p0
stage1 written to slice 0 sector 0 (abs 0)

root@test:~# ./installboot /dev/rdsk/c3t0d0s1
Bootblock version installed on /dev/rdsk/c3t0d0s1 is more recent or identical to
/boot/gptzfsboot
Use -F to override or install without the -u option.

Bootblock version installed on /dev/rdsk/c3t0d0s0 is more recent or identical to
/boot/loader64.efi
Use -F to override or install without the -u option.

Bootblock version installed on /dev/rdsk/c3t0d0s0 is more recent or identical to
/boot/loader32.efi
Use -F to override or install without the -u option.

/boot/pmbr is newer than one in /dev/rdsk/c3t0d0p0
stage1 written to slice 0 sector 0 (abs 0)

root@test:~#