run0: implement -v/--validate to renew temporary auth

This is meant to mirror sudo's -v/--validate options, which autohrize
the user without running a command.

shell-completion/bash/run0

@@ -38,7 +38,7 @@ _run0() {
         --setenv --background
     )
     local OPTS="${opts_with_values[*]} -h --help -V --version --no-ask-password --slice-inherit --empower"
-    OPTS="$OPTS -k --reset-timestamp -K --remove-timestamp"
+    OPTS="$OPTS -k --reset-timestamp -K --remove-timestamp -v --validate"
 
     local i
     for (( i=1; i <= COMP_CWORD; i++ )); do

shell-completion/zsh/_run0

@@ -49,6 +49,7 @@ local -a args=(
     '(--chdir -D -i --same-root-dir)'{--chdir=,-D+}'[Run within the specified working directory]:directory:_files -/'
     '(-k --reset-timestamp)'{-k,--reset-timestamp}'[Revoke temporary authorization for this terminal]'
     '(-K --remove-timestamp)'{-K,--remove-timestamp}'[Revoke temporary authorizations for this user session]'
+    '(-v --validate)'{-v,--validate}'[Request authorization from polkit]'
     '(-i)'--via-shell"[Invoke command via target user's login shell]"
     '(--via-shell --chdir -D --same-root-dir)'-i"[Shortcut for --via-shell --chdir='~']"
     '*--setenv=[Set the specified environment variable in the session]:environment variable:_parameters -g "*export*" -S = -q'