[http] fix cache-control syntax in EtagHTTPCacheManager
use , to separate cache response directive
closes #5307539
--- a/web/httpcache.py Wed Apr 22 17:48:32 2015 +0200
+++ b/web/httpcache.py Tue Apr 28 17:00:35 2015 +0200
@@ -75,7 +75,7 @@
self.req.set_header('Cache-control', 'no-cache')
return
req.set_header('Cache-control',
- 'must-revalidate;max-age=%s' % self.max_age())
+ 'must-revalidate,max-age=%s' % self.max_age())
mdate = self.last_modified()
# use a timestamp, not a formatted raw header, and let
# the front-end correctly generate it