Add missing API documentatoin for DataPathAddr

COmmit 0307fe1a0bcdc02583a24add41eb783c117bad8c added
a new `DataPathAddr` property to the swarm/init and swarm/join
endpoints. This property was not yet added to the
documentation.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

api/swagger.yaml

@@ -7394,6 +7394,16 @@ paths:
               AdvertiseAddr:
                 description: "Externally reachable address advertised to other nodes. This can either be an address/port combination in the form `192.168.1.1:4567`, or an interface followed by a port number, like `eth0:4567`. If the port number is omitted, the port number from the listen address is used. If `AdvertiseAddr` is not specified, it will be automatically detected when possible."
                 type: "string"
+              DataPathAddr:
+                description: |
+                  Address or interface to use for data path traffic (format: `<ip|interface>`), for example,  `192.168.1.1`,
+                  or an interface, like `eth0`. If `DataPathAddr` is unspecified, the same address as `AdvertiseAddr`
+                  is used.
+
+                  The `DataPathAddr` specifies the address that global scope network drivers will publish towards other
+                  nodes in order to reach the containers running on this node. Using this parameter it is possible to
+                  separate the container data traffic from the management traffic of the cluster.
+                type: "string"
               ForceNewCluster:
                 description: "Force creation of a new swarm."
                 type: "boolean"
@@ -7442,6 +7452,17 @@ paths:
                 type: "string"
               AdvertiseAddr:
                 description: "Externally reachable address advertised to other nodes. This can either be an address/port combination in the form `192.168.1.1:4567`, or an interface followed by a port number, like `eth0:4567`. If the port number is omitted, the port number from the listen address is used. If `AdvertiseAddr` is not specified, it will be automatically detected when possible."
+                type: "string"
+              DataPathAddr:
+                description: |
+                  Address or interface to use for data path traffic (format: `<ip|interface>`), for example,  `192.168.1.1`,
+                  or an interface, like `eth0`. If `DataPathAddr` is unspecified, the same address as `AdvertiseAddr`
+                  is used.
+
+                  The `DataPathAddr` specifies the address that global scope network drivers will publish towards other
+                  nodes in order to reach the containers running on this node. Using this parameter it is possible to
+                  separate the container data traffic from the management traffic of the cluster.
+
                 type: "string"
               RemoteAddrs:
                 description: "Addresses of manager nodes already participating in the swarm."

docs/api/version-history.md

@@ -26,6 +26,8 @@ keywords: "API, Docker, rcli, REST, documentation"
   the daemon. This endpoint is experimental and only available if the daemon is started with experimental features
   enabled.
 * `GET /images/(name)/get` now includes an `ImageMetadata` field which contains image metadata that is local to the engine and not part of the image config.
+* `POST /swarm/init` now accepts a `DataPathAddr` property to set the IP-address or network interface to use for data traffic
+* `POST /swarm/join` now accepts a `DataPathAddr` property to set the IP-address or network interface to use for data traffic
 
 ## v1.30 API changes