[O] Bug: Ampersand is not replaced in URLs in html export [8.2.10 (release_8.2.10 @ /usr/share/emacs/24.5/lisp/org/)]

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Hi,

I write down some notes including URLs like this one:

http://www.reichelt.de/Drehschalter/DS-3/3/index.html?&ARTICLE=7217

afterwards I do C-c C-e h h to export my notes to an html-file.

I expect that the & is replaced by &.

But it's not replaced.
This causes the w3c validation to fail.

Kind regards
Fritz Reichwald


Emacs  : GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.6)
 of 2015-09-10 on foutrelis
Package: Org-mode version 8.2.10 (release_8.2.10 @ 
/usr/share/emacs/24.5/lisp/org/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe 
org-src-native-tab-command-maybe
                      org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook 
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-html-format-drawer-function '(lambda (name contents) contents)
 org-latex-format-inlinetask-function 'ignore
 org-confirm-shell-link-function 'yes-or-no-p
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-format-drawer-function '(lambda (name contents) contents)
 org-from-is-user-regexp nil
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook org-show-block-all 
append local] 5]
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook 
org-babel-show-result-all append local] 5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ascii-format-drawer-function '(lambda (name contents width) contents)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point 
org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers 
org-cycle-hide-inline-tasks
                  org-cycle-show-empty-lines 
org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-html-format-headline-function 'ignore
 org-html-format-inlinetask-function 'ignore
 org-agenda-files '("~/freichw/doc/org/agenda.org" 
"~/freichw/doc/org/first.org" "~/freichw/doc/org/inbox.org"
                    "~/agenda.org")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )