Added support for upload progress indicators in Apache and lighttpd 1.4.x (won't work in WEBrick or lighttpd 1.3.x) #1475 [Sean Treadway]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1552 5ecf4fe2-1ee6-0310-87b1-e25e094e27de