automx: the seed writes the schema 2021.6 reads

The hand-written seed predates automx2's prio column, so every
config-v1.1.xml request 500'd against a table the seed had just made —
and the predecessor's own database had the same gap: client
autoconfiguration has been silently broken on the old stack for a long
time, behind a root page that answered 200. The live database gained
the column by ALTER; a fresh mesh now seeds it right.

modules/mailu/automx/files/setup-db

@@ -32,6 +32,7 @@ EOT
 SERVER=$(cat <<EOT
 CREATE TABLE server(
   id INT PRIMARY KEY  NOT NULL,
+  prio INT NOT NULL DEFAULT 10,
   name  TEXT NOT NULL,
   port INT NOT NULL,
   type TEXT NOT NULL,