haproxy: update to version 1.5.11 and pending patches

haproxy: update to version 1.5.11 and pending patches

     - BUG/MEDIUM: backend: correctly detect the domain when use_domain_only is used
     - MINOR: ssl: load certificates in alphabetical order
     - BUG/MINOR: checks: prevent http keep-alive with http-check expect
     - BUG/MEDIUM: Do not set agent health to zero if server is disabled in config
     - MEDIUM/BUG: Only explicitly report "DOWN (agent)" if the agent health is zero
     - BUG/MINOR: stats:Fix incorrect printf type.
     - DOC: add missing entry for log-format and clarify the text
     - BUG/MEDIUM: http: fix header removal when previous header ends with pure LF
     - BUG/MEDIUM: channel: fix possible integer overflow on reserved size computation
     - BUG/MINOR: channel: compare to_forward with buf->i, not buf->size
     - MINOR: channel: add channel_in_transit()
     - MEDIUM: channel: make buffer_reserved() use channel_in_transit()
     - MEDIUM: channel: make bi_avail() use channel_in_transit()
     - BUG/MEDIUM: channel: don't schedule data in transit for leaving until connected
     - BUG/MAJOR: log: don't try to emit a log if no logger is set
     - BUG/MINOR: args: add missing entry for ARGT_MAP in arg_type_names
     - BUG/MEDIUM: http: make http-request set-header compute the string before removal
     - BUG/MINOR: http: fix incorrect header value offset in replace-hdr/replace-value
     - BUG/MINOR: http: abort request processing on filter failure
     - BUG/MINOR: pattern: error message missing
     - BUG/MEDIUM: pattern: some entries are not deleted with case insensitive match

Signed-off-by: Thomas Heil <heil@terminal-consulting.de>