Updated Login Module.

- OAUTH LOGIN: is generic based on a new OAUTH_20_GENERIC_API
        - Storage (at the moment only SQL) for OAUTH_CONSUMER configuration.
        - OAUTH login and callback are generic.
        - Added a OAUTH_20_GENERIC_API.
        - Added scripts and templates to build the new OAUTH tables.
        - Fixed CMS_STORAGE_SQL_I.check_sql_query_validity issue.
        - Extended CMS_STORAGE_SQL_I, to execute scripts with paramerters.
        - Updated filter, now it's generic for every OAUTH consumer.

examples/demo/site/scripts/oauth2_consumers.sql

@@ -0,0 +1,20 @@
+BEGIN;
+
+CREATE TABLE "oauth2_consumers"(
+   "cid" INTEGER PRIMARY KEY NOT NULL CHECK("cid">=0),
+   "name" VARCHAR(255) NOT NULL,
+   "api_secret" TEXT  NOT NULL,
+   "api_key" TEXT NOT NULL,
+   "scope" VARCHAR (100) NOT NULL,
+   "protected_resource_url" VARCHAR (255) NOT NULL,
+   "callback_name" VARCHAR(255) NOT NULL,
+   "extractor" VARCHAR(50) NOT NULL,
+   "authorize_url" VARCHAR (255) NOT NULL,
+   "endpoint"  VARCHAR (255) NOT NULL,
+   CONSTRAINT "cid"
+    UNIQUE("cid"),
+   CONSTRAINT "name"
+    UNIQUE("name")
+   );
+
+COMMIT;