log diffs setting

src/freedombone-app-keyserver

         sed -i "s|#stat_hour:.*|stat_hour: $((1 + RANDOM % 8))|g" $sksconf_file
         sed -i "s|stat_hour:.*|stat_hour: $((1 + RANDOM % 8))|g" $sksconf_file
     fi
+    if ! grep -q "disable_log_diffs:" $sksconf_file; then
+        echo "disable_log_diffs:" >> $sksconf_file
+    else
+        sed -i "s|#disable_log_diffs:.*|disable_log_diffs:|g" $sksconf_file
+        sed -i "s|disable_log_diffs:.*|disable_log_diffs:|g" $sksconf_file
+    fi
 
     chown debian-sks: $sksconf_file