Bug 11307: Fix potential XSS attack in public catalog RSS feed

To test:
1/ Craft a url like
/cgi-bin/koha/opac-search.pl?q=a&count=50"'<h1>test</h1>&sort_by=acqdate_dsc&format=rss2
2/ look at the source, notice
<opensearch:itemsPerPage>50"'<h1>test</h1></opensearch:itemsPerPage>
3/ apply the patch, and reload url
4/ source now contains
 <opensearch:itemsPerPage>50&quot;'&lt;h1&gt;test&lt;/h1&gt;</opensearch:itemsPerPage>

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 11307: (follow-up) apply fix to bootstrap theme (master and 3.14.x only)

To test:
Same as first patch, but using bootstrap theme

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7143: Cleaning up docs/history.txt

Sorting some lines on date
Typo on date for Bernardo Kriegel
Splitting one line in 2008 in two lines
Replacing some tabs with spaces in October 2013

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
No typos or problems found.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>