haproxy: patches from upstream

 - [PATCH 7/9] BUILD: remove TODO from the spec file and add READM
 - [PATCH 8/9] MINOR: log: make MAX_SYSLOG_LEN overridable at build time
 - [PATCH 9/9] MEDIUM: log: support a user-configurable max log line
    length

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