Merge changes from D6LTS Pressflow fork#131

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dsnopek wants to merge 5 commits intopressflow:masterfrom d6lts:d-652

+3,574-29

Commits on Jan 3, 2019

Apply the changes from D6LTS 6.47
dsnopek
committed

Commits on Feb 18, 2019

Commits on May 8, 2019

Apply the changes from D6LTS 6.52
dsnopek
committed

Commits on Jun 5, 2019

Resolve conflicts with upstream Pressflow master
dsnopek
committed