replace 127.0.0.1 by the assigned IP address in the container's /etc/hosts file.
change 127.0.0.1 -> 127.0.1.1 & remove ::1 -> hostname mapping
Merge remote-tracking branch 'upstream/master'

Conflicts:
	container.go
Container memory limit can be specified in kilobytes, megabytes or gigabytes

    -m 10  # 10 bytes
    -m 10b # 10 bytes
    -m 10k # 10240 bytes (10 * 1024)
    -m 10m # 10485760 bytes (10 * 1024 * 1024)
    -m 10g # 10737418240 bytes (10 * 1024 * 1024 * 1024)

Units are case-insensitive, and 'kb', 'mb' and 'gb' are equivalent to 'k', 'm' and 'g'.
Update documentation to reflect changes in Config and HostConfig
Fix 2585 and clean up warning in contributing.rst
network: add iptables rules to explicitly allow forwarding

Explicitly enable container networking for Fedora and other distros that
have a REJECT all rule at the end of their FORWARD table.
Return “err” instead of “nil” when MkdirAll() fails when binding a volume
Merge pull request #2610 from stapelberg/patch-1

Return “err” instead of “nil” when MkdirAll() fails when binding a volume
Removes duplicate changelog entry
setup network when reconnecting to ghost container

Re-adding the line to setup the network when reconnecting to a ghost
container.  It was inadvertently removed by commit
31638ab2ad2a5380d447780f05f7aa078c9421f5.
Merge pull request #2611 from seancron/changelog-edit

Removes duplicate changelog entry
Fix 2585, rebase to master
Merge pull request #2615 from jpoimboe/ghost-networking-fix

setup network when reconnecting to ghost container
Merge pull request #2590 from metalivedev/2585-addphplib

Fix 2585 and clean up warning in contributing.rst
Update ubuntu packaging script, especially to stop docker group deletion
- Added delete all the containers example
make all image ID and container ID API responses use the Long ID (Closes #2098)
- Updated description
Correctly express "any address" to iptables.

Iptables interprets "-d 0.0.0.0" as "-d 0.0.0.0/32", not /0. This
results in the DNAT rule never matching any traffic if not bound
to a specific host IP.

Fixes #2598