conditionalget: use canonical "ETag" capitalization conditionalget

It matches the capitalization in rfc2616 and is also faster
for Rack::HeaderHash users that also use the canonical
capitalization.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/rack/conditionalget.rb b/lib/rack/conditionalget.rb
index ceab3347..136d1879 100644
--- a/lib/rack/conditionalget.rb
+++ b/lib/rack/conditionalget.rb
@@ -51,7 +51,7 @@ module Rack
     end
 
     def etag_matches?(none_match, headers)
-      etag = headers['Etag'] and etag == none_match
+      etag = headers['ETag'] and etag == none_match
     end
 
     def modified_since?(modified_since, headers)