fix: don't use toolbox as constant for FQDN

issue: containers#969

Setting the hostname to toolbox causes timeouts whenever anything tries
to resolve the name of the machine - for example `sudo` does this.

This change makes it so the FQDN is set to
`${container_name}.${hostname}` as recommended in the linked issue.

After this change commands can properly resolve the local FQDN.

src/cmd/create.go

@@ -418,8 +418,11 @@ func createContainer(container, image, release string, showCommandToEnter bool)
 
 	createArgs = append(createArgs, xdgRuntimeDirEnv...)
 
+	hostname, err := os.Hostname()
+	containerHostname := container + "." + hostname
+
 	createArgs = append(createArgs, []string{
-		"--hostname", "toolbox",
+		"--hostname", containerHostname,
 		"--ipc", "host",
 		"--label", "com.github.containers.toolbox=true",
 	}...)
@@ -429,7 +432,6 @@ func createContainer(container, image, release string, showCommandToEnter bool)
 	createArgs = append(createArgs, []string{
 		"--name", container,
 		"--network", "host",
-		"--no-hosts",
 		"--pid", "host",
 		"--privileged",
 		"--security-opt", "label=disable",

src/cmd/initContainer.go

@@ -177,14 +177,6 @@ func initContainer(cmd *cobra.Command, args []string) error {
 				}
 			}
 
-			if _, err := os.Readlink("/etc/hosts"); err != nil {
-				if err := redirectPath("/etc/hosts",
-					"/run/host/etc/hosts",
-					false); err != nil {
-					return err
-				}
-			}
-
 			if localtimeTarget, err := os.Readlink("/etc/localtime"); err != nil ||
 				localtimeTarget != "/run/host/etc/localtime" {
 				if err := redirectPath("/etc/localtime",