Feature Request: bzip2 support in pg_dump, pg_restore

Hi, dear postgres developers,

A small investigation showed to me that bzip2 compressed sql files take only 60% of the space of gz compressed files. Since bzip2 is fairly common today, could one add an option to pg_dump and pg_restore supporting this compression type in their custom format? Or do the PostgreSQL folks prefer no to do that regarding backwards compatibility?

Regards,
Daniel Migowski