Bug 16031: sitemap.pl shouldn't append protocol to OPACBaseURL

 Bug 16031: sitemap.pl shouldn't append protocol to OPACBaseURL

Since bug 5010 was pushed, OPACBaseURL already contains the protocol. The
sitemap.pl script was written before this was pushed, and thus still concatenates
http:// in front of OPACBaseURL.

This patch removes this behaviour.

To test:
- Have OPACBaseURL set to (say) http://myopac.com
- Run the sitemap.pl script without specifying the --url param
=> FAIL: Notice URLs look like http://http://myopac.com/bib... in the sitemap files.
- Apply the patch
- Run the sitemap.pl script without specifying the --url param
=> SUCCESS: Notice URLs look correctly like http://myopac.com/bib...
- Sign off :-D

Regards

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>