Added support for the "gateway" parameter.  This is an optional single hostname/ip address that ALL outgoing email can be routed to.
Added support for the "gateway" parameter.  This is an optional single hostname/ip address that ALL outgoing email can be routed to.


git-svn-id: 88158f914d5603334254b4adf21dfd50ec107162@107557 13f79535-47bb-0310-9956-ffa450edef68

chibenwa/james,chibenwa/james,aduprat/james,chibenwa/james,aduprat/james,rouazana/james,aduprat/james,rouazana/james,chibenwa/james,aduprat/james,rouazana/james,rouazana/james