Add password confirmation

target/scripts/helpers/database/manage/postfix-accounts.sh

@@ -98,9 +98,14 @@ function __account_already_exists() {
 
 # Also used by addsaslpassword
 function _password_request_if_missing() {
+  local CONFIRM
   if [[ -z ${PASSWD} ]]; then
     read -r -s -p 'Enter Password: ' PASSWD
     echo
     [[ -z ${PASSWD} ]] && _exit_with_error 'Password must not be empty'
+
+    read -r -s -p 'Confirm Password: ' CONFIRM
+    echo
+    [[ ${PASSWD} != "${CONFIRM}" ]] && _exit_with_error 'Passwords do not match!'
   fi
 }