Bug 6147 : Correcting invalid RSS

Bug 6147 : Correcting invalid RSS

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Feed validates using http://feed1.w3.org/ with the following recommendations:

This feed is valid, but interoperability with the widest range of feed readers could be improved by implementing the following recommendations.
line 12, column 149: Relative href value on self link: /cgi-bin/koha/opac-search.pl?idx=kw&q=some&sort_by=acqdate_dsc&format=rss2 [help]
... p;sort_by=acqdate_dsc&amp;format=rss2"/>
                                             ^
line 12, column 149: Self reference doesn't match document location [help]
... p;sort_by=acqdate_dsc&amp;format=rss2"/>
                                             ^
line 20, column 158: Unregistered link relationship: search (10 occurrences) [help]
... _by=&amp;format=opensearchdescription"/>
                                             ^
line 40, column 9: description should not contain relative URL references: /cgi-bin/koha/opac-reserve.pl?biblionumber=10 (10 occurrences) [help]
						]]></description>
         ^
line 22, column 5: Misplaced Item (9 occurrences) [help]
     <item>

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit a0a57b9526c244771aac57ad3ac3dee5dec1a16e)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>