Unify endpoint config creation when using connect_container_to_network

Signed-off-by: Joffrey F <joffrey@docker.com>

docker/api/network.py

 import json
 
 from ..errors import InvalidVersion
-from ..utils import check_resource, minimum_version, normalize_links
+from ..utils import check_resource, minimum_version
 from ..utils import version_lt
 
 
@@ -63,26 +63,12 @@ class NetworkApiMixin(object):
                                      aliases=None, links=None):
         data = {
             "Container": container,
-            "EndpointConfig": {
-                "Aliases": aliases,
-                "Links": normalize_links(links) if links else None,
-            },
+            "EndpointConfig": self.create_endpoint_config(
+                aliases=aliases, links=links, ipv4_address=ipv4_address,
+                ipv6_address=ipv6_address
+            ),
         }
 
-        # IPv4 or IPv6 or neither:
-        if ipv4_address or ipv6_address:
-            if version_lt(self._version, '1.22'):
-                raise InvalidVersion('IP address assignment is not '
-                                     'supported in API version < 1.22')
-
-            data['EndpointConfig']['IPAMConfig'] = dict()
-            if ipv4_address:
-                data['EndpointConfig']['IPAMConfig']['IPv4Address'] = \
-                    ipv4_address
-            if ipv6_address:
-                data['EndpointConfig']['IPAMConfig']['IPv6Address'] = \
-                    ipv6_address
-
         url = self._url("/networks/{0}/connect", net_id)
         res = self._post_json(url, data=data)
         self._raise_for_status(res)

docs/networks.md

@@ -17,11 +17,13 @@ For example, setting the subnet to `192.168.52.0/24` and gateway address
 to `192.168.52.254`
 
 ```python
-
-ipam_config = docker.utils.create_ipam_config(
+ipam_pool = docker.utils.create_ipam_pool(
     subnet='192.168.52.0/24',
     gateway='192.168.52.254'
 )
+ipam_config = docker.utils.create_ipam_config(
+    pool_configs=[ipam_pool]
+)
 
 docker_client.create_network("network1", driver="bridge", ipam=ipam_config)
 ```
@@ -160,7 +162,7 @@ in `docker.utils.create_ipam_config`.
 ```python
 ipam_pool = docker.utils.create_ipam_pool(
     subnet='124.42.0.0/16',
-    iprange='124.42.0.0/8',
+    iprange='124.42.0.0/24',
     gateway='124.42.0.254',
     aux_addresses={
         'reserved1': '124.42.1.1'