Self-registration now permitted, subject to configuration

git-svn-id: http://scm.dspace.org/svn/repo/trunk@449 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace/etc/database_schema.sql

@@ -389,7 +389,7 @@ CREATE TABLE TasklistItem
 CREATE TABLE RegistrationData
 (
   registrationdata_id   INTEGER PRIMARY KEY,
-  eperson_id            INTEGER REFERENCES EPerson(eperson_id),
+  email                 VARCHAR(64) UNIQUE,
   token                 VARCHAR(48),
   expires		TIMESTAMP
 );