* add database schema and config sample

cmtd.conf

@@ -1 +0,0 @@
-{}

docs/cmtd.conf.sample

@@ -0,0 +1,9 @@
+{
+  db => ['dbi:SQLite:dbname=data/data.db'],
+  captcha => {
+    table => 'captcha',
+    tries => 5,
+    limit => 500,
+    ft_file => '/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf'
+  },
+}

docs/schema.sqlite3.sql

@@ -0,0 +1,42 @@
+BEGIN TRANSACTION;
+
+CREATE TABLE "sites" (
+  "id" INTEGER PRIMARY KEY NOT NULL,
+  "site" varchar(4) NOT NULL
+);
+
+CREATE UNIQUE INDEX "sites_uniq" ON "sites" ("site");
+
+CREATE TABLE "pages" (
+  "id" INTEGER PRIMARY KEY NOT NULL,
+  "sid" int(11) NOT NULL,
+  "hash" varchar(32) NOT NULL,
+  "path" text NULL DEFAULT '',
+  FOREIGN KEY ("id") REFERENCES "sites" ("id")
+    ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX "pages_uniq" ON "pages" ("hash");
+
+CREATE TABLE "comments" (
+  "id" INTEGER PRIMARY KEY NOT NULL,
+  "pid" int(11) NOT NULL,
+  "seq" int(11) NOT NULL,
+  "name"  varchar(255) NOT NULL DEFAULT '',
+  "email" varchar(255) NOT NULL DEFAULT '',
+  "text" text NOT NULL,
+  FOREIGN KEY ("pid") REFERENCES "pages" ("id")
+    ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX "page_comments" ON "comments" ("pid", "seq");
+
+CREATE TABLE "captcha" (
+  "id" INTEGER PRIMARY KEY NOT NULL,
+  "tries" INTEGER NOT NULL DEFAULT 0,
+  "shown" INTEGER NOT NULL DEFAULT 0,
+  "code" varchar(16) NOT NULL,
+  "data" TEXT NOT NULL
+);
+
+COMMIT;