Remove some misunderstanding of adding several masters in slave zones

Remove some misunderstanding of adding several masters in slave zones

Trying to remove some misunderstanding of how several masters are added by adding the "Master addressess is to be seperated by spaces" to avoid misunderstanding as noted in the IRC by me.

Reason
I understood that by this is MASTER OR [master in array]

Coz: Seen inconsistent to "@Habbie this is what unix commands are documented like
@Habbie  in every project
@Habbie over the last 30 years"