REGTEST: filters: add compression test

This test checks that data transferred with compression is correctly received at
different download speeds
diff --git a/reg-tests/compression/s00000.lua b/reg-tests/compression/s00000.lua
new file mode 100644
index 0000000..2cc874b
--- /dev/null
+++ b/reg-tests/compression/s00000.lua
@@ -0,0 +1,19 @@
+
+local data = "abcdefghijklmnopqrstuvwxyz"
+local responseblob = ""
+for i = 1,10000 do
+  responseblob = responseblob .. "\r\n" .. i .. data:sub(1, math.floor(i % 27))
+end
+
+http01applet = function(applet)
+  local response = responseblob
+  applet:set_status(200)
+  applet:add_header("Content-Type", "application/javascript")
+  applet:add_header("Content-Length", string.len(response)*10)
+  applet:start_response()
+  for i = 1,10 do
+    applet:send(response)
+  end
+end
+
+core.register_service("fileloader-http01", "http", http01applet)