New snapd 2.21 release

[Michael Vogt]

Hi,


The snappy team is proud to announce the release of snapd 2.21. After
a refreshing holiday season we are back in action and have built some
interesting new features! The focus was improving classic confinement
and aliases support.

Here are just some of the highlights:
- improve alias handling (auto-alias improvements, new `snap aliases`
  command to list them and their status)
- fix install of classic confined snaps from the store
- improve output of "snap find" when nothing is found
- switch to a pure go based gettext
- fixes in the "snap info" output (fix remote sizes, fix tracked
  channel output)
- allow using new snapd from the core snap
- new interfaces:
  - physical-memory-*, io-ports-control
  - interface improvements:
  - upower-observer
  - allow getsockopt by default everyhwere

This release is uploaded to the Ubuntu 14.04/16.04/16.10 "proposed"
pocket.  It will also be available in 17.04 and in the "candidate"
channel for the "core" and "ubuntu-core" snaps. Other distros will
follow shortly. The stable channel continues to have the 2.20
version. If you would like to test out this new snapd version on your
Ubuntu Core device you can use the command:

$ snap refresh --candidate core

On the classic distribution you can help testing by enabling -proposed
and then installing snapd [1].


Hope you enjoy the new release, if there are any questions, please let
us know!

Cheers,
 Michael (on behalf of the snappy team)


[1] https://wiki.ubuntu.com/Testing/EnableProposed