Add no sign-up locale variant for "require user" option

app/views/application/_questionbox.html.haml

@@ -19,9 +19,13 @@
         %strong= t(".status.locked")
     - elsif !user_signed_in? && user.privacy_require_user?
       .text-center
+        - if Retrospring::Config.registrations_enabled?
           %strong= t(".status.require_user_html",
             sign_in: link_to(t("voc.login"), new_user_session_path),
             sign_up: link_to(t("voc.register"), new_user_registration_path))
+        - else
+          %strong= t(".status.require_user_no_registration_html",
+            sign_in: link_to(t("voc.login"), new_user_session_path))
     - else
       - if user_signed_in? || user.privacy_allow_anonymous_questions?
         #question-box{

config/locales/views.en.yml

@@ -143,6 +143,9 @@ en:
         require_user_html: |
           This user requires others to be logged in to ask questions. <br/>
           (%{sign_in} or %{sign_up})
+        require_user_no_registration_html: |
+          This user requires others to be logged in to ask questions. <br/>
+          (%{sign_in})
         non_anonymous_html: |
           This user does not want to receive anonymous questions. <br/>
           (%{sign_in} or %{sign_up})