Package make-initrd-plymouth: Information

- Avoid randomness-related udev-induced boot stalls.

- Runtime:
  + ueventd tries to process events again if it did not work the first time.
  + Move READONLY handle to fstab service.
  + Fix polld service dependency.
- New feature:
  + iscsi: feature adds you to perform a diskless system boot using pxe
  and iSCSI (thx Mikhail Chernonog) (ALT#27354).
- Feature mdadm:
  + md-raid-member handler assume that it has successfully processed all the events.
- Feature pipeline:
  + Use ro,loop options only for a non-device files.

- Runtime:
  + Allow init= to be symlink
  + Fix root=NUMBER
  + Show on console stopped services
  + Make killall messages more informative
- Utilities:
  + initrd-put: Copy absolute symlinks (ALT#39877)
- Misc:
  + Make a compatibility symlink only if the file doesn't exist
  + Create initramfs filesystem structure based on system filesystem
  + Add more documentation