teamd: Add ZeroMQ interface

enable ZeroMQ interface

teamd -Z "tcp:\\127.0.0.1:5555"
teamdctl -Z "tcp:\\127.0.0.1:5555" config dump

Take care when you use this type of connection.
Security must be ensured by firewall or other tools.
There could be added verification by certificate with SSL layer.
It could be added in next version.

changes:
   fix problem with autotools and wrong version of libzmq

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
teamd: Update man page for ZMQ interface

changes from v1 -> v2:
  makes man more verbosable.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
teamd: Changes error messages in teamdctl interfaces.

Messages was changed due into adding new communication
interface to teamd and teamdctl. It should be more clear
from which communication interface messages comes from.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>