Fix link export
* lisp/ox-html.el (org-html-link):
* lisp/ox-latex.el (org-latex-link):
* lisp/ox-man.el (org-man-link):
* lisp/ox-odt.el (org-odt-link):
* lisp/ox-texinfo.el (org-texinfo-link): Append "//" after some link
types.
* lisp/ox-md.el (org-md-link):
* contrib/lisp/ox-groff.el (org-groff-link): Ditto. Also remove some
unused code, as search options are already stripped out link's path.
Since
3589f64e42dfbc894e789c2a9fba530eac36c665, Org ignores "//" in
a link type so it has to be re-introduced upon exporting.