Docstring fixes for init and init_path

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

docker/api/container.py

@@ -498,6 +498,9 @@ class ContainerApiMixin(object):
                 container, as a mapping of hostname to IP address.
             group_add (:py:class:`list`): List of additional group names and/or
                 IDs that the container process will run as.
+            init (bool): Run an init inside the container that forwards
+                signals and reaps processes
+            init_path (str): Path to the docker-init binary
             ipc_mode (str): Set the IPC mode for the container.
             isolation (str): Isolation technology to use. Default: `None`.
             links (dict or list of tuples): Either a dictionary mapping name

docker/models/containers.py

@@ -493,7 +493,7 @@ class ContainerCollection(Collection):
             hostname (str): Optional hostname for the container.
             init (bool): Run an init inside the container that forwards
                 signals and reaps processes
-            init_path (bool): Path to the docker-init binary
+            init_path (str): Path to the docker-init binary
             ipc_mode (str): Set the IPC mode for the container.
             isolation (str): Isolation technology to use. Default: `None`.
             labels (dict or list): A dictionary of name-value labels (e.g.

docker/types/containers.py

@@ -423,9 +423,9 @@ class HostConfig(dict):
                 raise host_config_version_error('init', '1.25')
             self['Init'] = init
 
-        if init_path:
+        if init_path is not None:
             if version_lt(version, '1.25'):
-                raise host_config_version_error('init', '1.25')
+                raise host_config_version_error('init_path', '1.25')
             self['InitPath'] = init_path