Implement avoidSameFamily geographic criterion

When enabled, avoid pairing players from the same club who have
the same family name (surname). Uses existing player.name field.

view-webapp/src/main/webapp/js/tour-information.inc.js

@@ -247,7 +247,8 @@ onLoad(() => {
         },
         geo: {
           mmsDiffCountry: form.val('mmsDiffCountry'),
-          mmsDiffClub: form.val('mmsDiffClub')
+          mmsDiffClub: form.val('mmsDiffClub'),
+          avoidSameFamily: form.val('avoidSameFamily')
         },
         handicap: {
           useMMS: form.val('useMMS'),

view-webapp/src/main/webapp/tour-parameters.inc.html

@@ -142,6 +142,12 @@
           rather than pairing players of the same club.
         </label>
       </div>
+      <div class="field">
+        <label>
+          <input type="checkbox" name="avoidSameFamily" value="true" #if($tour.pairing.geo.avoidSameFamily) checked #end/>
+          avoid pairing players from the same club with the same family name
+        </label>
+      </div>
     </div>
     <div class="title"><i class="dropdown icon"></i>Handicap parameters</div>
     <div class="content">