Add server action: change admin password
diff --git a/openstack/compute/servers/client.go b/openstack/compute/servers/client.go
index 3d51dd8..3ce6965 100644
--- a/openstack/compute/servers/client.go
+++ b/openstack/compute/servers/client.go
@@ -42,6 +42,10 @@
 	return c.getDeleteUrl(id)
 }
 
+func (c *Client) getActionUrl(id string) string {
+	return fmt.Sprintf("%s/servers/%s/action", c.endpoint, id)
+}
+
 func (c *Client) getListHeaders() (map[string]string, error) {
 	t, err := c.getAuthToken()
 	if err != nil {
@@ -69,6 +73,10 @@
 	return c.getListHeaders()
 }
 
+func (c *Client) getActionHeaders() (map[string]string, error) {
+	return c.getListHeaders()
+}
+
 func (c *Client) getAuthToken() (string, error) {
 	var err error
 
diff --git a/openstack/compute/servers/requests.go b/openstack/compute/servers/requests.go
index 28abd1c..772699b 100644
--- a/openstack/compute/servers/requests.go
+++ b/openstack/compute/servers/requests.go
@@ -96,3 +96,21 @@
 	})
 	return sr, err
 }
+
+// ChangeAdminPassword alters the administrator or root password for a specified
+// server.
+func ChangeAdminPassword(c *Client, id, newPassword string) error {
+	h, err := c.getActionHeaders()
+	if err != nil {
+		return err
+	}
+
+	err = perigee.Post(c.getActionUrl(id), perigee.Options{
+		ReqBody: struct{C map[string]string `json:"changePassword"`}{
+			map[string]string{"adminPass": newPassword},
+		},
+		MoreHeaders: h,
+		OkCodes: []int{202},
+	})
+	return err
+}
diff --git a/openstack/compute/servers/servers.go b/openstack/compute/servers/servers.go
index e3bdbe3..28d66d0 100644
--- a/openstack/compute/servers/servers.go
+++ b/openstack/compute/servers/servers.go
@@ -36,6 +36,9 @@
 // Metadata includes a list of all user-specified key-value pairs attached to the server.
 //
 // Links includes HTTP references to the itself, useful for passing along to other APIs that might want a server reference.
+//
+// AdminPass will generally be empty ("").  However, it will contain the administrative password chosen when provisioning a new server without a set AdminPass setting in the first place.
+// Note that this is the ONLY time this field will be valid.
 type Server struct {
 	Id         string
 	TenantId   string `mapstructure:tenant_id`
@@ -53,6 +56,7 @@
 	Addresses  map[string]interface{}
 	Metadata   map[string]interface{}
 	Links      []interface{}
+	AdminPass  string `mapstructure:adminPass`
 }
 
 // GetServers interprets the result of a List() call, producing a slice of Server entities.