confile: add clearer for lxc.monitor.unshare

src/lxc/confile.c

@@ -218,6 +218,7 @@ static int clr_config_start(const char *, struct lxc_conf *);
 
 static int set_config_monitor(const char *, const char *, struct lxc_conf *);
 static int get_config_monitor(const char *, char *, int, struct lxc_conf *);
+static int clr_config_monitor(const char *, struct lxc_conf *);
 
 static int set_config_group(const char *, const char *, struct lxc_conf *);
 static int get_config_group(const char *, char *, int, struct lxc_conf *);
@@ -309,7 +310,7 @@ static struct lxc_config_t config[] = {
 	{ "lxc.start.auto",           set_config_start,                get_config_start,             clr_config_start,             },
 	{ "lxc.start.delay",          set_config_start,                get_config_start,             clr_config_start,             },
 	{ "lxc.start.order",          set_config_start,                get_config_start,             clr_config_start,             },
-	{ "lxc.monitor.unshare",      set_config_monitor,              get_config_monitor,           NULL },
+	{ "lxc.monitor.unshare",      set_config_monitor,              get_config_monitor,           clr_config_monitor,           },
 	{ "lxc.group",                set_config_group,                get_config_group,             NULL },
 	{ "lxc.environment",          set_config_environment,          get_config_environment,       NULL },
 	{ "lxc.init_cmd",             set_config_init_cmd,             get_config_init_cmd,          NULL },
@@ -2787,9 +2788,6 @@ int lxc_clear_config_item(struct lxc_conf *c, const char *key)
 	} else if (strcmp(key, "lxc.ephemeral") == 0) {
 		c->ephemeral = 0;
 
-	} else if (strcmp(key, "lxc.monitor.unshare") == 0) {
-		c->monitor_unshare = 0;
-
 	} else if (strcmp(key, "lxc.include") == 0) {
 		lxc_clear_includes(c);
 
@@ -4215,3 +4213,9 @@ static inline int clr_config_syslog(const char *key, struct lxc_conf *c)
 	c->syslog = NULL;
 	return 0;
 }
+
+static inline int clr_config_monitor(const char *key, struct lxc_conf *c)
+{
+	c->monitor_unshare = 0;
+	return 0;
+}