docker daemon: show info about the server

For combing through logs, have an intro line with information about the
running instance of the docker daemon.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
Add contrib/man to our generated deb

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Fix a few minor man formatting consistency issues

Some flags ended with a colon, some didn't.  For man pages, the prevailing normal practice is not to end the flags lines with colons.

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
docker save: fix filemode permissions

currently the files created are not readable. This makes the files and
directories permissions more sane.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
Change shm mode to 1777

Fixes #5126
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Fix libcontainer network support on rhel6

It seems that netlink in older kernels, including RHEL6, does not
support RTM_SETLINK with IFLA_MASTER. It just silently ignores it, reporting
no error, causing netlink.NetworkSetMaster() to not do anything yet
return no error.

We fix this by introducing and using AddToBridge() in a very similar manner
to CreateBridge(), which use the old ioctls directly.

This fixes https://github.com/dotcloud/docker/issues/4668

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
Update bundlescripts to use "set -e" consistently

"set -e" is already inherited here from make.sh, but explicit is always better than implicit (hence the "set -e" in the first place!)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
delete containers during build after every step

This commit changes the way docker build cleans up containers.
Containers get cleaned up right away after they've been committed and
they've become an image.

When the build fails, only the last container of the failing step is
left behind.

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Avoid "invalid memory address or nil pointer dereference" panic

libcontainer.GetNamespace returns nil on FreeBSD because
libcontainer.namespaceList is empty. In this case, Namespaces#Get should
return nil instead of being panic.

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Merge pull request #5115 from alexlarsson/fix-libcontainer-network-rhel6

Fix libcontainer network support on rhel6
Merge pull request #5131 from crosbymichael/shm-mode

Change shm mode to 1777
Merge pull request #5087 from vbatts/vbatts-save_permissions

docker save: fix filemode permissions
Merge pull request #5069 from tianon/hack-make-ubuntu-man

Add contrib/man to our generated deb
net: do not create -b/--bridge specified bridge

If the bridge specified using -b/--bridge doesn't
exist, fail instead of attempting to create it.

This is consistent with the docker documentation
on -b/--bridge: "Attach containers to a pre
existing network bridge". 

It is also less surprising in an environment where
the operator expected the bridge to be properly
set up before docker starts and expects docker to
fail fast if the bridge was not up instead of
masking this error and coming up in some
potentially broken state.

With this patch, docker still creates docker0 if
needed and no bridge was explicitly specified.

Docker-DCO-1.1-Signed-off-by: Daniel Norberg <daniel.norberg@gmail.com> (github: danielnorberg)
bridge driver: clean up error returns

Docker-DCO-1.1-Signed-off-by: Daniel Norberg <daniel.norberg@gmail.com> (github: danielnorberg)
Adding timestamp end to events endpoint. Modifying api docs.

Docker-DCO-1.1-Signed-off-by: Isabel Jimenez <contact@isabeljimenez.com> (github: jimenez)
Merge pull request #5140 from unclejack/build_immediate_cleanup

delete containers during build after every step
Merge pull request #4821 from jimenez/3903-add_event_end_timestamp-feature

Adding timestamp end to events endpoint. Modifying api docs.
Merge pull request #5143 from kzys/ns-nil

Avoid "invalid memory address or nil pointer dereference" panic
Merge pull request #4990 from vbatts/vbatts-server_show_info

docker daemon: show info about the server