CLEANUP: global: remove the nbproc field from the global structure

Let's use 1 in the rare places where it was still referenced since it's
now its only possible value.
diff --git a/include/haproxy/global-t.h b/include/haproxy/global-t.h
index 057d90e..b5ecc55 100644
--- a/include/haproxy/global-t.h
+++ b/include/haproxy/global-t.h
@@ -90,7 +90,6 @@
 	int uid;
 	int gid;
 	int external_check;
-	int nbproc;
 	int nbthread;
 	int mode;
 	unsigned int hard_stop_after;	/* maximum time allowed to perform a soft-stop */
diff --git a/src/haproxy.c b/src/haproxy.c
index c4f2c9b..26c70bd 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -167,7 +167,6 @@
 /* global options */
 struct global global = {
 	.hard_stop_after = TICK_ETERNITY,
-	.nbproc = 1,
 	.numa_cpu_mapping = 1,
 	.nbthread = 0,
 	.req_count = 0,
@@ -2009,19 +2008,18 @@
 		exit(1);
 	}
 
-	/* recompute the amount of per-process memory depending on nbproc and
-	 * the shared SSL cache size (allowed to exist in all processes).
+	/* recompute the amount of per-process memory depending on
+	 * the shared SSL cache size
 	 */
 	if (global.rlimit_memmax_all) {
 #if defined (USE_OPENSSL) && !defined(USE_PRIVATE_CACHE)
 		int64_t ssl_cache_bytes = global.tune.sslcachesize * 200LL;
 
 		global.rlimit_memmax =
-			((((int64_t)global.rlimit_memmax_all * 1048576LL) -
-			  ssl_cache_bytes) / global.nbproc +
+			((((int64_t)global.rlimit_memmax_all * 1048576LL) - ssl_cache_bytes) +
 			 ssl_cache_bytes + 1048575LL) / 1048576LL;
 #else
-		global.rlimit_memmax = global.rlimit_memmax_all / global.nbproc;
+		global.rlimit_memmax = global.rlimit_memmax_all;
 #endif
 	}
 
@@ -2332,15 +2330,6 @@
 		global.mode &= ~(MODE_DAEMON | MODE_QUIET);
 	}
 
-	if ((global.nbproc > 1) && !(global.mode & (MODE_DAEMON | MODE_MWORKER))) {
-		if (!(global.mode & (MODE_FOREGROUND | MODE_DEBUG)))
-			ha_warning("<nbproc> is only meaningful in daemon mode or master-worker mode. Setting limit to 1 process.\n");
-		global.nbproc = 1;
-	}
-
-	if (global.nbproc < 1)
-		global.nbproc = 1;
-
 	if (global.nbthread < 1)
 		global.nbthread = 1;
 
@@ -3206,7 +3195,6 @@
 
 		} else {
 			/* wait mode */
-			global.nbproc = 1;
 			in_parent = 1;
 		}
 
diff --git a/src/sample.c b/src/sample.c
index 09c272c..4c98012 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -3948,7 +3948,7 @@
 smp_fetch_nbproc(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
 	smp->data.type = SMP_T_SINT;
-	smp->data.u.sint = global.nbproc;
+	smp->data.u.sint = 1;
 	return 1;
 }
 
diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 6839132..059fef3 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -4979,8 +4979,7 @@
 	if (!ssl_shctx && global.tune.sslcachesize) {
 		alloc_ctx = shctx_init(&ssl_shctx, global.tune.sslcachesize,
 		                       sizeof(struct sh_ssl_sess_hdr) + SHSESS_BLOCK_MIN_SIZE, -1,
-		                       sizeof(*sh_ssl_sess_tree),
-		                       ((global.nbthread > 1) || (!global_ssl.private_cache && (global.nbproc > 1))) ? 1 : 0);
+		                       sizeof(*sh_ssl_sess_tree), (global.nbthread > 1));
 		if (alloc_ctx <= 0) {
 			if (alloc_ctx == SHCTX_E_INIT_LOCK)
 				ha_alert("Unable to initialize the lock for the shared SSL session cache. You can retry using the global statement 'tune.ssl.force-private-cache' but it could increase CPU usage due to renegotiations if nbproc > 1.\n");
diff --git a/src/stats.c b/src/stats.c
index 1f2a684..1c0d45f 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -86,7 +86,7 @@
 	[INF_VERSION]                        = { .name = "Version",                     .desc = "Product version" },
 	[INF_RELEASE_DATE]                   = { .name = "Release_date",                .desc = "Date of latest source code update" },
 	[INF_NBTHREAD]                       = { .name = "Nbthread",                    .desc = "Number of started threads (global.nbthread)" },
-	[INF_NBPROC]                         = { .name = "Nbproc",                      .desc = "Number of started worker processes (global.nbproc)" },
+	[INF_NBPROC]                         = { .name = "Nbproc",                      .desc = "Number of started worker processes (historical, always 1)" },
 	[INF_PROCESS_NUM]                    = { .name = "Process_num",                 .desc = "Relative worker process number (1..Nbproc)" },
 	[INF_PID]                            = { .name = "Pid",                         .desc = "This worker process identifier for the system" },
 	[INF_UPTIME]                         = { .name = "Uptime",                      .desc = "How long ago this worker process was started (days+hours+minutes+seconds)" },
@@ -3339,7 +3339,7 @@
 		      (appctx->ctx.stats.flags & STAT_SHNODE) ? (uri->node ? uri->node : global.node) : "",
 	              (appctx->ctx.stats.flags & STAT_SHDESC) ? ": " : "",
 		      (appctx->ctx.stats.flags & STAT_SHDESC) ? (uri->desc ? uri->desc : global.desc) : "",
-	              pid, relative_pid, global.nbproc, global.nbthread,
+	              pid, relative_pid, 1, global.nbthread,
 	              up / 86400, (up % 86400) / 3600,
 	              (up % 3600) / 60, (up % 60),
 	              global.rlimit_memmax ? ultoa(global.rlimit_memmax) : "unlimited",
@@ -4319,7 +4319,7 @@
 	info[INF_RELEASE_DATE]                   = mkf_str(FO_PRODUCT|FN_OUTPUT|FS_SERVICE, haproxy_date);
 
 	info[INF_NBTHREAD]                       = mkf_u32(FO_CONFIG|FS_SERVICE, global.nbthread);
-	info[INF_NBPROC]                         = mkf_u32(FO_CONFIG|FS_SERVICE, global.nbproc);
+	info[INF_NBPROC]                         = mkf_u32(FO_CONFIG|FS_SERVICE, 1);
 	info[INF_PROCESS_NUM]                    = mkf_u32(FO_KEY, relative_pid);
 	info[INF_PID]                            = mkf_u32(FO_STATUS, pid);