feat(web/converse): Import repository r/2440

Imports the converse forum software I wrote a few years ago. I want to
clean this up a bit and try using Hotwire with it.

Note: The original repository was AGPL-3.0 licensed. I'm the copyright
holder and have relicensed it to GPL-3.0 in the commit that is being
merged.

Imported from: https://github.com/tazjin/converse

git-subtree-dir: web/converse
git-subtree-mainline: 386afdc794eefd5bcbc47a3fd7b898a07f69f978
git-subtree-split: 09168021e7405f6b83798d0b43aa6e69e744ae87
Change-Id: Ia8b587db5174ef5b3c52910d3d027199150c58e0

2 files changed, 7 insertions, 0 deletions

diff --git a/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/down.sql b/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/down.sql
new file mode 100644
index 000000000000..bb6528f33d78
--- /dev/null
+++ b/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/down.sql
@@ -0,0 +1 @@
+ALTER TABLE threads ADD COLUMN body TEXT NOT NULL DEFAULT '';
diff --git a/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/up.sql b/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/up.sql
new file mode 100644
index 000000000000..07ff9a1196f6
--- /dev/null
+++ b/web/converse/migrations/2018-04-14-140818_posts_only_in_posts/up.sql
@@ -0,0 +1,6 @@
+-- Instead of storing the thread OP in the thread table, this will
+-- make it a post as well.
+-- At the time at which this migration was created no important data
+-- existed in any converse instances, so data is not moved.
+
+ALTER TABLE threads DROP COLUMN body;