TPAC: Restore OpenSearch and RSS feeds for searches

[Dan Scott]

* Evergreen 2.4, 2.5, master

JSPAC used to include OpenSearch support so that one could add your Evergreen instance as a search engine. It would be nice to have that back.

IIRC, JSPAC also used to offer up RSS feeds for search results. Not so sure whether we really need that, but thought it might be worth mentioning.

For OpenSearch support, Ben Shum pointed me back at a conversation we had a few months ago: http://irc.evergreen-ils.org/evergreen/2013-08-16#i_22600

Roughly, dropping "<link type="application/opensearchdescription+xml" rel='search' title="[% l('Evergreen OpenSearch') %]" href="/opac/extras/opensearch/1.1/-/osd.xml" />" into base.tt2 should do the trick... in theory.

[Dan Scott (denials)]

Pushed http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/dbs/tpac_restore_opensearch with a fix for this problem.

I had to make a couple of small changes to Open-ILS/WWW/SuperCat.pm:
* We pass in the hostname now, so we can use an absolute path.
* I've opted to use HTTPS to protect searcher privacy.

Seems to work, but eyes / testing are greatly appreciated.

[Dan Scott (denials)]

Ben Shum caught an extraneous " that could be confusing to browsers; I've force-pushed the fix to the branch. Thanks Ben!

[Dan Wells (dbw2)]

Added pullrequest as this bug seemed ready for it.

[Ben Shum (bshum)]

Works for me, I'm picking it to master for upcoming 2.6 as new functionality. I also added a small commit with a tiny statement for the release notes.