Package make-initrd-plymouth: Information

- 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

- Feature mdadm:
  + Generate udev rules for guessed raid devices.
- Feature pipeline:
  + Fix possible race in the waitdev.
- Feature network:
  + Always import runtime environment.
- Runtime:
  + Use wrapper around readlink for portability.
  + Use start-stop-daemon from busybox.
  + Udev variables $ID_\* are optional.
  + Add default udev rules.
  + Add support for root=SERIAL=\*.
- Utilities:
  + initrd-put: Handle symlinks in the root directory.
  + initrd-put: Get the canonical path correctly.
  + initrd-put: Set mode and owner after directories creation.
  + depinfo: Do not show an error if softdep is not found.
- Build:
  + Add busybox and libshell as submodules.
- Misc:
  + All make messages should go to stderr.