mysqlbackup: create MySQL-database servers backup easy

Why mysqlbackup?

1. Requires minimum coding to create everyday MySQL-backups with some
   additional functions.

2. Backups can be compressed on-the-fly and automatically rotated after
   specified number of a days past.

3. "Slave mode" feature - stop slave, save it's status and then create backup.
   Start slave afterwards.

4. Includes basic database maintenance: check, optimize tables before backup
   creation.

5. It can be safely used on a large MySQL installations (1000+ databases).

6. It is written in sh - code interpreter available in a base system.
