- Readd USE_RELRO_NOW=1, USE_STACKPROTECTOR=1, USE_PIE=1
- adapt haproxy-1.6.0-sec-options.patch so the build no longer
complains about unused options
- drop CPU="%{_target_cpu}" as it is unused
- migrate to DEBUG_CFLAGS to OPT_CFLAGS
OBS-URL: https://build.opensuse.org/package/show/server:http/haproxy?expand=0&rev=346