title: Salt - Reach all minions in multimaster mode
body: <p>I'm migrating salt to salt multimaster.
  So in minions config I have my master list, with some multimaster parameters.
  I see each master have his connected minions and can talk only with its.
  I actually have jobs which send salt commands to my master to run tasks on some minions.
  With multimaster I will need to connect on each master and run command if I want to reach all desired minions.</p>
  <p>Is there a way to run commands to all minions from only one host ?</p>