install_postfixadmin.sh: some minor changes.

install_postfixadmin.sh

@@ -938,6 +938,16 @@ done
 if $_failed ; then
    echo_failed
    error "$(cat $log_file)"
+
+   echononl "\tcontinue anyway [yes/no]: "
+   read OK
+   OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+   while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+      echononl "Wrong entry! - repeat [yes/nno]: "
+      read OK
+   done
+   [[ $OK = "yes" ]] || fatal "Script terminated by user input.."
+
 else
    echo_ok
 fi