This reverts commit 0e51aaef.

The latest tag wasn't compiling fine because of erp5-doc still being a
submodule in erp5-vifib branch but not in slapos anymore.

For now nofile hard limit is set to 1048576.

/reviewed-on nexedi/slapos.package!104

slapos node collect needs them to query hardware status.

/reviewed-on nexedi/slapos.package!103

The kernel in Debian9 was updated by upstream and new updates, among
regular bugfixes contain fixes for security issues:

https://metadata.ftp-master.debian.org/changelogs//main/l/linux/linux_4.9.189-3_changelog

The kernel was also included into just oldstable (compared to
oldstable-proposed-updates). I'm not dropping oldstable-proposed-updates
repository for now, since maybe we might need it once again in the
future.

/reviewed-on nexedi/slapos.package!102

@rafael  or @tomo 

Please feel free to merge in so we can have deployment tests working back again.

/reviewed-on nexedi/slapos.package!101

  fuse requires to be system wide installed, as it is linked with kernel modules.

  Only 4.9.185 contains the fix from Kiril. For now, debian 8 won't contains it.

  The user can decide set upgrade kernel as True, by doing so, the computer will start
  to automatically upgrade kernel on the next upgrades.

  The invokation of the script is done manually, in future we might have a cron task

   Officially we prefer erp5.net for now.

  We may keep some legacy distros arround for a while, but I'm not sure it can run fully.

  This is too old we may not want to support it anymore

When module was loaded by udev, there wasn't the parameter nested=Y

/reviewed-on nexedi/slapos.package!100

default external interface.

OBS can't use the gitclone recipe for Babeld because there is no
network, so we keep the source files resulting of the local build.

/reviewed-on nexedi/slapos.package!99

/reviewed-on nexedi/slapos.package!98