BUG/MEDIUM: sample: http_date() doesn't provide the right day of the week

Gregor Kovač reported that http_date() did not return the right day of the
week. For example "Sat, 22 Jan 2016 17:43:38 GMT" instead of "Fri, 22 Jan
2016 17:43:38 GMT". Indeed, gmtime() returns a 'struct tm' result, where
tm_wday begins on Sunday, whereas the code assumed it began on Monday.

This patch must be backported to haproxy 1.5 and 1.6.
1 file changed