lxc-monitor default name to .* to monitor all containers

doc/lxc-monitor.sgml.in

@@ -49,7 +49,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   <refsynopsisdiv>
     <cmdsynopsis>
       <command>lxc-monitor</command>
-      <arg choice="req">-n <replaceable>name</replaceable></arg>
+      <arg choice="opt">-n <replaceable>name</replaceable></arg>
     </cmdsynopsis>
   </refsynopsisdiv>
 
@@ -57,10 +57,13 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     <title>Description</title>
 
     <para>
-      <command>lxc-monitor</command> monitors the state of the
-      specified containers. The <replaceable>name</replaceable> can be
-      a regular expression, conforming with posix2, so it is possible
-      to monitor all the containers, several of them or just one.
+      <command>lxc-monitor</command> monitors the state of containers. The
+      <replaceable>name</replaceable> argument may be used to specify
+      which containers to monitor. It is a regular expression, conforming
+      with posix2, so it is possible to monitor all the containers,
+      several of them or just one. If not specified,
+      <replaceable>name</replaceable> will default to '.*' which will
+      monitor all containers in <command>lxcpath</command>.
     </para>
 
     <para>

src/lxc/lxc_monitor.c

@@ -42,13 +42,14 @@ static const struct option my_longopts[] = {
 static struct lxc_arguments my_args = {
 	.progname = "lxc-monitor",
 	.help     = "\
---name=NAME\n\
+[--name=NAME]\n\
 \n\
 lxc-monitor monitors the state of the NAME container\n\
 \n\
 Options :\n\
   -n, --name=NAME   NAME for name of the container\n\
                     NAME may be a regular expression",
+	.name     = ".*",
 	.options  = my_longopts,
 	.parser   = NULL,
 	.checker  = NULL,