Merge pull request #6445 from davidjb/onbeforeissue-error-handling

Run post hook when `_on_before_issue()` errors

acme.sh

@@ -4502,6 +4502,7 @@ issue() {
 
   if ! _on_before_issue "$_web_roots" "$_main_domain" "$_alt_domains" "$_pre_hook" "$_local_addr"; then
     _err "_on_before_issue."
+    _on_issue_err "$_post_hook"
     return 1
   fi