supported scenarios improvements

[jreidinger]

feedback from opensuse-factory

Other than some formulations and missing info this is fine and ripe for
opensuse.org/wiki and announcement on news.opensuse.org.

1. missing: What version is referenced.
   (here OSS 13.2 / YaST2 3.1.108 / Grub2 2.02~beta2)
2. referered "stage1" should be at least once named "Stage1 of Grub2"
   for enhanced clarity and disambiguenes
3. Section "Partition table" item "GPT" subitem "bios_boot partition"
   Please give additional info, or create it fully if missing.
   (First Partiton, Size, Partion.type.id) maybe a "one-click-item"
   in the Partioneer to create it, if GPT and or UEFI is selected.
4. missing: What filesystems are supported / allowed / working for
   /boot. E.g. a sentence like this:
   If Root-FS (/) is not one of [list:ext2,ext3,ext4,btrfs,...],
   /boot has to be it's own partiton of the FS-type [list:...]
   to ensure a working boot-scenario.

[Mirppc]

what about ARM and Uboot support? This is important if Suse wants to get into the embedded arm world especially with devices like the Raspberry Pi, Odroid, Chip/PocketCHIP and others. I noticed in the SUPPORTED SCENEREOS there was no ARM listed.

[jreidinger]

@Mirppc arm is supported, but in fact we support there grub2, which is used as wrapped for anything underhood. we have in code some specific parts for arm and I see it in real world, that it works :)

[dgdavid]

After asking to @jreidinger for that in #yast freenode channel in IRC, seems that https://github.com/yast/yast-bootloader/blob/master/SUPPORTED_SCENARIOS.md should be improved.

[ancorgs]

I created a corresponding card to track this in the private trello board used by the YaST Team at SUSE:
https://trello.com/c/tqGXMAcp/4602-yast-bootloader-update-the-document-about-supported-scenarios