Bug #3554 Driver doesn't accept empty database parameter

Description:
Hi

I am developing GUI database manager and I need to connect mysql database by using empty database parameter. Today I downloaded nightly snapshot and unfortunately it did't work like earlier versions. The snapshot produces SQLException if I do not specify database in connection string. This is new bug in Connector/J 3.1-nightly-2004042. I have succesfully used earlier versions of Connector/J 3.0.10 and 3.1.1-alpha.

Teemu

Stacktrace:
------------

java.sql.SQLException: Malformed URL 'jdbc:mysql://localhost:3306/?user=root&password=root&maxRows=0&profileSQL=false&connectTimeout=60000&allowLoadLocalInfile=true&continueBatchOnError=true&strictUpdates=true&useCompression=false&paranoid=true&allowMultiQueries=true&requireSSL=false&useSSL=false&socketTimeout=0&useUnicode=false&characterEncoding&useTimezone=false'.
	at com.mysql.jdbc.Connection.<init>(Connection.java:373)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:218)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at org.myconnector.db.MyDataSource.connect(MyDataSource.java:260)
	at org.myconnector.gui.swing.db.DataSourceTree.connectDataSource(DataSourceTree.java:610)
	at org.myconnector.gui.swing.db.DataSourcesTree$ConnectDBAction.actionPerformed(DataSourcesTree.java:496)
	at org.myconnector.gui.swing.db.DataSourcesTree$TreeMouseHandler.mouseClicked(DataSourcesTree.java:431)
	

How to repeat:
Just try to connect without specifying database parameter in connection string:
            
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/?user=monty&password=greatsqldb");

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html