MINOR: log: adds counters on received syslog messages.

This patch adds a global counter of received syslog messages
and this one is exported on CLI "show info" as "CumRecvLogs".

This patch also updates internal conn counter and freq
of the listener and the proxy for each received log message to
prepare a further export on the "show stats".
diff --git a/include/haproxy/log.h b/include/haproxy/log.h
index d8b95a8..9810869 100644
--- a/include/haproxy/log.h
+++ b/include/haproxy/log.h
@@ -49,6 +49,9 @@
 extern THREAD_LOCAL char *logline;
 extern THREAD_LOCAL char *logline_rfc5424;
 
+/* global syslog message counter */
+extern int cum_log_messages;
+
 /* syslog UDP message handler */
 void syslog_fd_handler(int fd);
 
@@ -165,6 +168,7 @@
 }
 
 struct ist *build_log_header(enum log_fmt format, int level, int facility, struct ist *metadata, size_t *nbelem);
+
 #endif /* _HAPROXY_LOG_H */
 
 /*
diff --git a/include/haproxy/stats-t.h b/include/haproxy/stats-t.h
index baf2fac..139b546 100644
--- a/include/haproxy/stats-t.h
+++ b/include/haproxy/stats-t.h
@@ -317,6 +317,7 @@
 	INF_TOTAL_SPLICED_BYTES_OUT,
 	INF_BYTES_OUT_RATE,
 	INF_DEBUG_COMMANDS_ISSUED,
+	INF_CUM_LOG_MSGS,
 
 	/* must always be the last one */
 	INF_TOTAL_FIELDS
diff --git a/src/log.c b/src/log.c
index f8ac522..495a672 100644
--- a/src/log.c
+++ b/src/log.c
@@ -45,6 +45,8 @@
 #include <haproxy/tools.h>
 #include <haproxy/version.h>
 
+/* global recv logs counter */
+int cum_log_messages;
 
 /* log forward proxy list */
 struct proxy *cfg_log_forward;
@@ -3538,6 +3540,10 @@
 			}
 			buf->data = ret;
 
+			/* update counters */
+			_HA_ATOMIC_ADD(&cum_log_messages, 1);
+			proxy_inc_fe_conn_ctr(l, l->bind_conf->frontend);
+
 			parse_log_message(buf->area, buf->data, &level, &facility, metadata, &message, &size);
 
 			process_send_log(&l->bind_conf->frontend->logsrvs, level, facility, metadata, message, size);
diff --git a/src/stats.c b/src/stats.c
index e8ea831..d69c764 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -147,6 +147,7 @@
 	[INF_TOTAL_SPLICED_BYTES_OUT]        = { .name = "TotalSplicdedBytesOut",       .desc = "Total number of bytes emitted by current worker process through a kernel pipe since started" },
 	[INF_BYTES_OUT_RATE]                 = { .name = "BytesOutRate",                .desc = "Number of bytes emitted by current worker process over the last second" },
 	[INF_DEBUG_COMMANDS_ISSUED]          = { .name = "DebugCommandsIssued",         .desc = "Number of debug commands issued on this process (anything > 0 is unsafe)" },
+	[INF_CUM_LOG_MSGS]                   = { .name = "CumRecvLogs",                 .desc = "Total number of log messages received by log-forwarding listeners on this worker process since started" },
 };
 
 const struct name_desc stat_fields[ST_F_TOTAL_FIELDS] = {
@@ -3523,6 +3524,7 @@
 	info[INF_TOTAL_SPLICED_BYTES_OUT]        = mkf_u64(0, global.spliced_out_bytes);
 	info[INF_BYTES_OUT_RATE]                 = mkf_u64(FN_RATE, (unsigned long long)read_freq_ctr(&global.out_32bps) * 32);
 	info[INF_DEBUG_COMMANDS_ISSUED]          = mkf_u32(0, debug_commands_issued);
+	info[INF_CUM_LOG_MSGS]                   = mkf_u32(FN_COUNTER, cum_log_messages);
 
 	return 1;
 }