Make kill, pause, and unpause parallel.

Operations like kill, pause, and unpause -- which can operation on one or
more containers -- can greatly benefit from parallizing its main job (eq kill).

In the case of pauseand unpause, an --all option as was added. pause --all will
pause all **running** containers.  And unpause --all will unpause all **paused**
containers.

Signed-off-by: baude <bbaude@redhat.com>

completions/bash/podman

@@ -1,5 +1,6 @@
 : ${PROG:=$(basename ${BASH_SOURCE})}
 
+
 __podman_previous_extglob_setting=$(shopt -p extglob)
 shopt -s extglob
 
@@ -1934,6 +1935,10 @@ _podman_save() {
 }
 
 _podman_pause() {
+    local boolean_options="
+    -a
+    --all
+    "
      local options_with_args="
      --help -h
      "
@@ -2035,6 +2040,10 @@ _podman_stop() {
 }
 
 _podman_unpause() {
+    local boolean_options="
+    -a
+    --all
+    "
      local options_with_args="
      --help -h
      "