Alpha 4 available

The Alpha 4 release of the server is available. This is a quick fix release for non-standard roster subscription behavior of the server. See the changelog for details.

This update changes the schema for the jiveRoster table. See the database schema file for your database for the new table format. Existing customers should either drop the table and create a new one using the schema SQL, or alter the jiveRoster table, adding the new recv INTEGER NOT NULL column with a default value of -1 for existing records.