posix: adding freebsd specific rlimit constants

Respectively number of kqueues, pty limits per user.

Closes GH-6608.

Author: devnexen

UPGRADING

@@ -120,6 +120,10 @@ PHP 8.1 UPGRADE NOTES
     echo $h, "\n";
     ```
 
+- Posix:
+  . Added POSIX_RLIMIT_KQUEUES and POSIX_RLIMIT_NPTS. These rlimits are only
+    available on FreeBSD.
+
 ========================================
 3. Changes in SAPI modules
 ========================================

ext/posix/posix.c

@@ -138,6 +138,12 @@ static PHP_MINIT_FUNCTION(posix)
 #ifdef RLIMIT_STACK
 	REGISTER_LONG_CONSTANT("POSIX_RLIMIT_STACK", RLIMIT_STACK, CONST_CS | CONST_PERSISTENT);
 #endif
+#ifdef RLIMIT_KQUEUES
+	REGISTER_LONG_CONSTANT("POSIX_RLIMIT_KQUEUES", RLIMIT_KQUEUES, CONST_CS | CONST_PERSISTENT);
+#endif
+#ifdef RLIMIT_NPTS
+	REGISTER_LONG_CONSTANT("POSIX_RLIMIT_NPTS", RLIMIT_NPTS, CONST_CS | CONST_PERSISTENT);
+#endif
 #ifdef HAVE_SETRLIMIT
 	REGISTER_LONG_CONSTANT("POSIX_RLIMIT_INFINITY", RLIM_INFINITY, CONST_CS | CONST_PERSISTENT);
 #endif
@@ -1096,6 +1102,14 @@ static const struct limitlist {
 	{ RLIMIT_OFILE, "openfiles" },
 #endif
 
+#ifdef RLIMIT_KQUEUES
+	{ RLIMIT_KQUEUES, "kqueues" },
+#endif
+
+#ifdef RLIMIT_NPTS
+	{ RLIMIT_NPTS, "npts" },
+#endif
+
 	{ 0, NULL }
 };
 /* }}} */