doc: Update Japanese lxc.container.conf(5) for lxc.cap.keep = none

Update for commit 7035407

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
Update Arch Linux template and add common configuration files

Move common container configuration entries into template config.
Remove unnecessary service symlinking and configuration entries, as well as
guest configs and other redundant configuration, fix minor script bugs.
Clean up template command line, add -d option to allow disabling services.
Also enable getty's on all configured ttys to allow logins via lxc-console,
set lxc.tty value corresponding to default Arch /etc/securetty configuration.

This patch simplifies Arch Linux template a bit, while fixing some
longstanding issues. It also provides common configuration based on
files provided for Fedora templates.

Signed-off-by: Alexander Vladimirov <alexander.idkfa.vladimirov@gmail.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
Prevent write_config from corrupting container config

write_config doesn't check the value sig_name function returns,
this causes write_config to produce corrupted container config when
using non-predefined signal names.

Signed-off-by: Alexander Vladimirov <alexander.idkfa.vladimirov@gmail.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Reduce duplication in new style configs

This is a rather massive cleanup of config/templates/*

As new templates were added, I've noticed that we pretty much all share
the tty/pts configs, some capabilities being dropped and most of the
cgroup configuration. All the userns configs were also almost identical.

As a result, this change introduces two new files:
 - common.conf.in
 - userns.conf.in

Each is included by the relevant <template>.<type>.conf.in templates,
this means that the individual per-template configs are now overlays on
top of the default config.

Once we see a specific key becoming popular, we ought to check whether
it should also be applied to the other templates and if more than 50% of
the templates have it set to the same value, that value ought to be
moved to the master config file and then overriden for the templates
that do not use it.

This change while pretty big and scary, shouldn't be very visible from a
user point of view, the actual changes can be summarized as:
 - Extend clonehostname to work with Debian based distros and use it for
   all containers.
 - lxc.pivotdir is now set to lxc_putold for all templates, this means
   that instead of using /mnt in the container, lxc will create and use
   /lxc_putold instead. The reason for this is to avoid failures when the
   user bind-mounts something else on top of /mnt.
 - Some minor cgroup limit changes, the main one I remember is
   /dev/console now being writable by all of the redhat based containers.
   The rest of the set should be identical with additions in the per-distro
   ones.
 - Drop binfmtmisc and efivars bind-mounts for non-mountall based
   unpriivileged containers as I assumed they got those from copy/paste
   from Ubuntu and not because they actually need those entries. (If I'm
   wrong, we probably should move those to userns.conf then).

Additional investigation and changes to reduce the config delta between
distros would be appreciated. In practice, I only expect lxc.cap.drop
and lxc.mount.entry to really vary between distros (depending on the
init system, the rest should be mostly common.

Diff from the RFC:
 - Add archlinux to the mix
 - Drop /etc/hostname from the clone hook

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
attach: Fix querying for the current personality

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>