Create new session, then link user keychain to session keychain

[drinkcat]

No description provided.

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored by someone other than the pull request submitter. We need to confirm that they're okay with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of the commit author(s) and merge this pull request when appropriate.

[drinkcat]

Dear googlebot, @smerrill intent is clear from #3246.

[dnschneid]

Googlebot hears ya; googlebot don't care

[dnschneid]

LGTM, if we're sure it's doing what we think it's doing

[smerrill]

Confirmed! Thanks for crouton and for pursuing a more complete fix.

[drinkcat]

2017-06-16_00-22-19_drinkcat_chroagh_ecryptfs_17 looks ok (17-encryption tests pass)