Merge branch 'date-rfc1123' Follow RFC2616 (Date header should be in RFC1123 format). But to reproduce this bug, program that uses libevent http-server should call `setlocale(LC_ALL, "")` to properly initliaze locale, so that strftime() retruns locale-specific dates. * date-rfc1123: add tests for evutil_date_rfc1123(). http: do not use local settings for Date header Closes: #417