Added support for named attribute groups

Add the possibility to group attributes by a name and assign these
groups to connections. This allows a more granular configuration of
which client will receive what atrributes.

testing/hosts/default/etc/ipsec.d/tables.sql

@@ -183,12 +183,27 @@ CREATE TABLE leases (
   released INTEGER NOT NULL
 );
 
+DROP TABLE IF EXISTS attribute_pools;
+CREATE TABLE attribute_pools (
+  id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+  name TEXT NOT NULL
+);
 DROP TABLE IF EXISTS attributes;
 CREATE TABLE attributes (
   id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+  identity INTEGER NOT NULL DEFAULT 0,
+  pool INTEGER NOT NULL DEFAULT 0,
   type INTEGER NOT NULL,
   value BLOB NOT NULL
 );
+DROP INDEX IF EXISTS attributes_identity;
+CREATE INDEX attributes_identity ON attributes (
+  identity
+);
+DROP INDEX IF EXISTS attributes_pool;
+CREATE INDEX attributes_pool ON attributes (
+  pool
+);
 
 DROP TABLE IF EXISTS ike_sas;
 CREATE TABLE ike_sas (