Bugzilla Bug 155402

The ebuild shall be made customizable as to the use of the external
documentation. This should be as easy as replacing:

sed -i
's,http://www.lisp.org/HyperSpec/,http://www.lispworks.com/reference/HyperSpec/,g'
config.lisp

line with something more to the likeness (XXXX represents a suitable use flag):

if use XXXX ; then
  sed -i
's,http://www.lisp.org/HyperSpec/,http://www.lispworks.com/reference/HyperSpec/,g'
config.lisp
else
  sed -i 's,"http://www.lisp.org/HyperSpec/",nil,' config.lisp
fi

Alternatively, the fact, that the HyperSpec is installed locally could be taken
advantage of too. I do not have a ready made solution, that is both robust and
does not introduce a dependency (which is not advisable for the sake of those
not willing to install the HyperSpec locally).

Moreover, the URL now used, while still functional, reports a "301 Moved
Permanently" status. The new URL shall be:
http://www.lispworks.com/documentation/HyperSpec/

The file impnotes.html is installed locally. It would be nice, if the
config.lisp would be notified of the fact, as described in 
http://clisp.cons.org/impnotes.html#describe (under the subheading Function
CUSTOM:IMPNOTES-ROOT.)


This bug could be construed an enhancement request. Even though it can, it is
not marked so, because of the annoyance its absence causes.

fixed, though we should consider using the configure option to set the
hyperspec url.

Actually that is what we do now, so this can be closed.