Add reddit link

app/src/main/res/drawable/ic_reddit_share_silhouette.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:viewportHeight="534" android:viewportWidth="534"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#F04923" android:fillType="nonZero" android:pathData="M503.646,266.667C503.646,238.029 480.434,214.817 451.796,214.817C437.817,214.817 425.155,220.375 415.829,229.367C380.388,203.792 331.554,187.271 277.163,185.375L300.784,74.246L377.954,90.65C378.892,110.271 394.963,125.929 414.813,125.929C435.271,125.929 451.85,109.346 451.85,88.892C451.85,68.438 435.271,51.854 414.813,51.854C400.263,51.854 387.8,60.321 381.746,72.525L295.575,54.208C293.179,53.688 290.667,54.158 288.609,55.5C286.546,56.838 285.104,58.938 284.592,61.342L258.217,185.338C203.029,186.871 153.413,203.413 117.513,229.271C108.196,220.338 95.579,214.817 81.654,214.817C53.017,214.817 29.8,238.029 29.8,266.667C29.8,287.738 42.388,305.838 60.438,313.946C59.638,319.1 59.2,324.329 59.2,329.634C59.2,409.404 152.058,474.071 266.609,474.071C381.154,474.071 474.017,409.404 474.017,329.634C474.017,324.367 473.588,319.171 472.8,314.054C490.959,305.988 503.646,287.825 503.646,266.667Z"/>
+</vector>

app/src/main/res/values/keys.xml

@@ -23,6 +23,7 @@
   <string name="url_etesync">https://tasks.org/etesync</string>
   <string name="url_tasker">https://tasks.org/help/tasker</string>
   <string name="url_donate">https://tasks.org/donate</string>
+  <string name="url_reddit">https://reddit.com/r/tasks</string>
 
   <!-- Eventually these should be moved to strings.xml for translation -->
   <string name="upgrade_header">Subscribe to unlock additional features and support open source software!</string>

app/src/main/res/values/strings.xml

@@ -664,4 +664,5 @@ File %1$s contained %2$s.\n\n
   <string name="price_per_month_abbreviated">$%s/mo</string>
   <string name="current_subscription">Current subscription: %s</string>
   <string name="purchases_updated">Purchases updated</string>
+  <string name="follow_reddit">Follow r/tasks</string>
 </resources>

app/src/main/res/xml/help_and_feedback.xml

@@ -15,6 +15,15 @@
       android:data="https://tasks.org" />
   </Preference>
 
+  <Preference
+    android:key="@string/follow_reddit"
+    android:title="@string/follow_reddit"
+    app:icon="@drawable/ic_reddit_share_silhouette">
+    <intent
+      android:action="android.intent.action.VIEW"
+      android:data="@string/url_reddit" />
+  </Preference>
+
   <Preference
     android:key="@string/contact_developer"
     android:title="@string/contact_developer"