New: Optional disable RSS Sync (set interval to zero)

src/NzbDrone.Api/Config/IndexerConfigModule.cs

@@ -9,7 +9,9 @@ namespace NzbDrone.Api.Config
         public IndexerConfigModule(IConfigService configService)
             : base(configService)
         {
-            SharedValidator.RuleFor(c => c.RssSyncInterval).InclusiveBetween(10, 120);
+            SharedValidator.RuleFor(c => c.RssSyncInterval)
+                .InclusiveBetween(10, 120)
+                .When(c => c.RssSyncInterval > 0);
         }
     }
 }

src/UI/Settings/Indexers/Options/IndexerOptionsViewTemplate.html

@@ -13,10 +13,11 @@
         <label class="control-label">RSS Sync Interval</label>
 
         <div class="controls">
-            <input type="number" min="10" max="120" name="rssSyncInterval"/>
+            <input type="number" name="rssSyncInterval"/>
 
             <span class="help-inline">
                 <i class="icon-nd-form-warning" title="This will apply to all indexers, please follow the rules set forth by them"/>
+                <i class="icon-nd-form-info" title="Set to zero to disable (this will stop all automatic release grabbing)"/>
             </span>
         </div>
     </div>