Bug 6739: (follow-up) fix more issues

Bug 6739: (follow-up) fix more issues

Installer fixes :
- in kohastructure.sql, category.BlockExpiredPatronOpacActions default
  value is -1, sets the same in updatedatabase.pl
- in syspref comment, replaces "opac actions such as placing a hold or
  reserve" by "opac actions such as placing holds or renrw books"
- A 'YesNo' does not have 'yes' as value in database, it is '1'.
- corrects small typo "categori" and syspref name case

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>