LP#1401286: Cleaner display of URIs in search results

Right now a record with an 856 like:

856 40 $zAvailable online $uhttp://publications.gc.ca $9LUSYS

shows up in search results with an HTML display like:

<a href="http://publications.gc.ca">http://publications.gc.ca</a> - Available online

rather than the much cleaner:

<a href="http://publications.gc.ca">Available online</a>

My simplistic approach is to check to see if the link text == the href,
and if so, and we have a note to display, to use the note as the text of
the link instead.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Ben Shum <bshum@biblio.org>