[O] Incorrect HTML hyperlink text when `/` used in bibtex key with ox-bibtex.el

[Rob Stewart]

Hi,

When the bibtex key contains a `/` character, the export with
ox-bibtex.el emits an incorrect string (I think) for citing the
reference at the point it is referenced. For example:

\cite{StewartTL11}

Which in the HTML becomes:

[<a href="#StewartTL11">4</a>]

However,

\cite{DBLP:conf/appt/StewartTL11}

Becomes:

[<a href="#DBLP:conf/appt/StewartTL11">DBLP:conf/appt/StewartTL11</a>]

So rather than a link displayed as "[4]" in the HTML, I see
"[DBLP:conf/appt/StewartTL11]".

Having experimented with omitting both `:` and `/`, it looks like it's
the `/` charactes in the bibtex key that makes the difference. Is that
a bug in ox-bibtex.el or bibtex2html?