Add CSS MIME Type

Modern browsers are checking for the MIME Type of pages
and in some cases will not load a file if the type is
wrong.



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@308329 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/http.c

@@ -108,6 +108,7 @@ static struct {
 	{ "gif", "image/gif" },
 	{ "html", "text/html" },
 	{ "htm", "text/html" },
+	{ "css", "text/css" },
 	{ "cnf", "text/plain" },
 	{ "cfg", "text/plain" },
 	{ "bin", "application/octet-stream" },