Output filenames do not contain database name

[Taxijaktse]

It would be good it the filename of the output files also contained the database name. Now they only contain the dump file name and the table name.

If the dump file is named dump.sql and it contains two databases d1 and d2 both containing the a table with the same name my_table it will be a collision.

Current output dump-my_table.sql

Suggested output dump-d1-my_table.sql dump-d2-my_table.sql