extras/try_gzip_static.rb in yahns-1.17.0 vs extras/try_gzip_static.rb in yahns-1.18.0

@@ -77,10 +77,13 @@
       "Content-Length" => len.to_s,
       "Last-Modified" => st.mtime.httpdate,
       "Accept-Ranges" => "bytes",
     }
     h["Cache-Control"] = "no-transform" unless mime =~ %r{\Atext\/}
-    h["Content-Encoding"] = "gzip" if gz_st
+    if gz_st
+      h["Content-Encoding"] = "gzip"
+      h["Vary"] = "Accept-Encoding"
+    end
     h
   end
 
   def head_no_gz(res, env, path, st)
     res[1] = fheader(env, path, st)