🏗️(caldav) migrate from davical to sabre/dav

docker/sabredav/sql/pgsql.users.sql

@@ -0,0 +1,14 @@
+CREATE TABLE users (
+    id SERIAL NOT NULL,
+    username VARCHAR(50),
+    digesta1 VARCHAR(32)
+);
+
+ALTER TABLE ONLY users
+    ADD CONSTRAINT users_pkey PRIMARY KEY (id);
+
+CREATE UNIQUE INDEX users_ukey
+    ON users USING btree (username);
+
+INSERT INTO users (username,digesta1) VALUES
+('admin',  '87fd274b7b6c01e48d7c2f965da8ddf7');