CLEANUP: threads: really move thread_info to hathreads.c

Commit 5a6e2245f ("REORG: threads: move the struct thread_info from
global.h to hathreads.h") didn't hold its promise well, as the thread_info
struct was still declared and initialized in haproxy.c in addition to being
in hathreads.c. Let's move it for real now.
diff --git a/src/haproxy.c b/src/haproxy.c
index 923b923..9e5f69a 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -138,8 +138,6 @@
 unsigned long pid_bit = 1;      /* bit corresponding to the process id */
 unsigned long all_proc_mask = 1; /* mask of all processes */
 
-struct thread_info thread_info[MAX_THREADS] = { };
-
 volatile unsigned long sleeping_thread_mask; /* Threads that are about to sleep in poll() */
 /* global options */
 struct global global = {
diff --git a/src/hathreads.c b/src/hathreads.c
index b159d5e..b25417c 100644
--- a/src/hathreads.c
+++ b/src/hathreads.c
@@ -29,7 +29,7 @@
 #include <types/global.h>
 #include <proto/fd.h>
 
-struct thread_info thread_info[MAX_THREADS];
+struct thread_info thread_info[MAX_THREADS] = { };
 THREAD_LOCAL struct thread_info *ti = &thread_info[0];
 
 #ifdef USE_THREAD