fpm sockets set listen back queue size to negative which trim down (#8638)

to the SOMAXCONN hard limit on macOs.

Author: devnexen

sapi/fpm/fpm/fpm_sockets.h

@@ -12,9 +12,9 @@
 #include "fpm_worker_pool.h"
 
 /*
-  On FreeBSD and OpenBSD, backlog negative values are truncated to SOMAXCONN
+  On Linux, FreeBSD, OpenBSD and macOS, backlog negative values are truncated to SOMAXCONN
 */
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__linux__)
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__linux__) || defined(__APPLE__)
 #define FPM_BACKLOG_DEFAULT -1
 #else
 #define FPM_BACKLOG_DEFAULT 511