Add commands:

• addShardToZone

• removeShardFromZone

• updateZoneKeyRange

Add methods:

• sh.addShardZone

• sh.removeShardZone

• sh.addZoneRange

• sh.removeZoneRange

Add note that the following are aliased to the equivalent above methods in MongoDB 3.4:

• sh.addShardTag

• sh.removeShardTag

• sh.addTagRange

• sh.removeTagRange