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Usage of the : separator for security option has been deprecated. = should be used instead (#21232)
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The client user agent is now passed to the registry on pull, build, push, login andsearch operations (#21306, #21373)
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Allow setting the Domainname and Hostname separately through the API (#20200)
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Docker info will now warn users if it can not detect the kernel version or the operating system (#21128)
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Fix an issue where docker stats --no-stream output could be all 0s (#20803)
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Fix a bug where some newly started container would not appear in a running docker statscommand (#20792)
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Post processing is no longer enabled for linux-cgo terminals (#20587)
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Values to --hostname are now refused if they do not comply with RFC1123 (#20566)
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Docker learned how to use a SOCKS proxy (#20366, #18373)
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Docker now supports external credential stores (#20107)
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docker ps now supports displaying the list of volumes mounted inside a container (#20017)
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docker info now also report Docker's root directory location (#19986)
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Docker now prohibits login in with an empty username (spaces are trimmed) (#19806)
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Docker events attributes are now sorted by key (#19761)
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docker ps no longer show exported port for stopped containers (#19483)
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Docker now cleans after itself if a save/export command fails (#17849)
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Docker load learned how to display a progress bar (#17329, #120078)
