contrib/docker_cr.sh: fix a typo in a comment

comand -> command
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

contrib/docker_cr.sh

@@ -48,7 +48,7 @@ MOUNT_MAP_ARGS=()
 
 #
 # The default mode is non-verbose, printing only a short message
-# saying if the comand succeeded or failed.  For the verbose mode,
+# saying if the command succeeded or failed.  For the verbose mode,
 # we could have used set -o xtrace but this option would have
 # generated excessive output suitable for debugging, not normal
 # usage.  So we set ${ECHO} to echo in the verbose mode to print