Add new redis command DELMPUB which is functionally identical to
DELMPUB except that it allows to specify multiple channel-message pairs
at once.
The syntax for the new command is:
DELMPUB number_of_keys number_of_channel_message_pairs
key [ key ... ]
channel message [ channel message ... ]
Signed-off-by: Arvo Heinonen <arvo.heinonen@nokia.com>
Change-Id: I9ee19675589ef1d0c19b2525281dfc2ac769da99