Bug 26783: set OpacRenewalAllowed to "Allow" for new Koha installations

test plan:
1.Drop and recreate database
2.Go through web installer
3.Observe that "OpacRenewalAllowed" is set to "Don't Allow"
4.Apply patch
5.Repeat steps 1 and 2
6.Observe that "OpacRenewalAllowed" is now set to "Allow"

sponsored-by: Catalyst

Signed-off-by: David Nind <david@davidnind.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

installer/data/mysql/mandatory/sysprefs.sql

@@ -435,7 +435,7 @@ INSERT INTO systempreferences ( `variable`, `value`, `options`, `explanation`, `
 ('OpacPrivacy','0',NULL,'if ON, allows patrons to define their privacy rules (reading history)','YesNo'),
 ('OpacPublic','1',NULL,'Turn on/off public OPAC','YesNo'),
 ('opacreadinghistory','1','','If ON, enables display of Patron Circulation History in OPAC','YesNo'),
-('OpacRenewalAllowed','0',NULL,'If ON, users can renew their issues directly from their OPAC account','YesNo'),
+('OpacRenewalAllowed','1',NULL,'If ON, users can renew their issues directly from their OPAC account','YesNo'),
 ('OpacRenewalBranch','checkoutbranch','itemhomebranch|patronhomebranch|checkoutbranch|none','Choose how the branch for an OPAC renewal is recorded in statistics','Choice'),
 ('OPACReportProblem', 0, NULL, 'Allow patrons to submit problem reports for OPAC pages to the library or Koha Administrator', 'YesNo'),
 ('OpacResetPassword','0','','Shows the ''Forgot your password?'' link in the OPAC','YesNo'),