maintainer: make _add_to_queue/_drop_from_queue take an array of messages
maintainer: make _add_to_queue/_drop_from_queue take an array of messages

Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

patchew-project/patchew,patchew-project/patchew,patchew-project/patchew,patchew-project/patchew