Don't break when sizes or durations are given as integers

demo/start.sh

@@ -26,9 +26,9 @@ for port in 8080 8081 8082; do
 
     https_port=$((port + 400))
     mkdir -p demo/$port
-    pushd demo/$port
+#    pushd demo/$port
 
-    rm $DIR/etc/$port.config
+    #rm $DIR/etc/$port.config
     python -m synapse.app.homeserver \
         --generate-config \
         -H "localhost:$https_port" \
@@ -39,7 +39,7 @@ for port in 8080 8081 8082; do
         -D \
         -vv \
 
-    popd
+ #   popd
 done
 
 cd "$CWD"