Bug 10951 - Adding NoLoginInstructions to system preferences

     On a failed login, the default message is harcorded into opac-auth.tt.

     It would be preferable to allow for a preference to override that message (for example: ...Please bring an ID to t
     The changes modify
         -opac-auth.tt to allow for custom value
         -admin/preferences/opac.pref to add it to the preferences with a description
         -C4/Auth.pm for the loading of the preference
         -sysprefs.sql
         -updatedatabase.pl

     TESTING
         1) in OPAC, logged out, try login in by entering no or wrong credentials.  Acknowledge the "Don't have a p
         2) Apply the patch
         3) Regression Test: Redo step 1.  Same (default) message should appear.
         4) Log in to intranet,
             - select NoLoginInstructions in system preferences.
             - Enter new (xml) message.  Possible:
             <h5>Welcome to Koha, please bring your passport to the front office</h5>
            - and save
         5) refresh the OPAC, try login again with invalid credentials.  The new message should appear.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Bug 10951 - Tweaked opac-auth.tt sentence.

The change was causing issue with the next sentence. Adjusted
the start (uppercase) and ending (dot) on self-registration
invitation.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Bug 10951: The new pref NoLoginInstructions should be empty by default.

We don't want to display an English message by default for everybody.
The default message is in the template, so the pref should be empty.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Bug 10951: DBrev 3.15.00.032

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10951: (follow-up) use Koha.Preference() template function

This patch uses the TT helper function Koha.Preference() to
retrieve the value of NoLoginInstructions rather than passing
it to all templates as a template variable.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10951: (follow-up) tweak description of the NoLoginInstructions system preferences

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10951: (follow-up) add support for NoLoginInstructions to Bootstrap theme

Signed-off-by: Galen Charlton <gmc@esilibrary.com>