cgroup: rpc -- Fix @manage_cgroups option parsing

In commit c7d646af we introduced cgroup resotre
modes but when option passed via RPC code it simply
either true or false which erroniously maps to
CG_MODE_PROPS or CG_MODE_IGNORE modes.

Lets map @true to CG_MODE_SOFT to preserve backward
compatibility and enhance this option in future via
separate option.
Reported-by: Ross Boucher <rboucher@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-service.c

@@ -385,8 +385,14 @@ static int setup_opts_from_req(int sk, CriuOpts *req)
 	if (req->has_cpu_cap)
 		opts.cpu_cap = req->cpu_cap;
 
+	/*
+	 * FIXME: For backward compatibility we setup
+	 * soft mode here, need to enhance to support
+	 * other modes as well via separate option
+	 * probably.
+	 */
 	if (req->has_manage_cgroups)
-		opts.manage_cgroups = req->manage_cgroups;
+		opts.manage_cgroups = req->manage_cgroups ? CG_MODE_SOFT : CG_MODE_IGNORE;
 
 	if (req->has_auto_ext_mnt)
 		opts.autodetect_ext_mounts = req->auto_ext_mnt;