[MINOR] health checks logging unification

The code was duplicated serveral times, let's use
server_status_printf() instead.

   text    data     bss     dec     hex filename
 263504    5800   64224  333528   516d8 haproxy-old
 262944    5800   64224  332968   514a8 haproxy-new

Depends on "struct chunk rework" and
 "Health check reporting code rework + health logging, v3"
1 file changed