net/ntp: Reverse "Disable ntpd stack gap"

120137c822 (svn r517694) disabled ntpd
ASLR stack gap, which caused ntpd to segfault. (The patch in
120137c822 was subsequently submitted
to nwtime.org for inclusion into upstream ntp.) src commit
889b56c8cd84c9a9f2d9e3b019c154d6f14d9021 addressed the underlying cause
for the setrlimit segfault negating the need for this workaround. This
commit removes the workaround.

MFH:		2021Q4 (after a month)

net/ntp/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	ntp
 PORTVERSION=	4.2.8p15
+PORTREVISION=	1
 CATEGORIES=	net
 MASTER_SITES=	http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ \
 		http://archive.ntp.org/ntp4/ntp-4.2/ \

net/ntp/files/patch-ntpd_ntpd.c

@@ -0,0 +1,39 @@
+--- ntpd/ntpd.c.orig	2020-06-23 02:17:48.000000000 -0700
++++ ntpd/ntpd.c	2021-10-15 19:52:05.945063000 -0700
+@@ -145,17 +145,6 @@
+ # include <seccomp.h>
+ #endif /* LIBSECCOMP and KERN_SECCOMP */
+ 
+-#ifdef __FreeBSD__
+-#include <sys/procctl.h>
+-#ifndef PROC_STACKGAP_CTL
+-/*
+- * Even if we compile on an older system we can still run on a newer one.
+- */
+-#define	PROC_STACKGAP_CTL	17
+-#define	PROC_STACKGAP_DISABLE	0x0002
+-#endif
+-#endif
+-
+ #ifdef HAVE_DNSREGISTRATION
+ # include <dns_sd.h>
+ DNSServiceRef mdns;
+@@ -438,18 +427,6 @@
+ 	char *argv[]
+ 	)
+ {
+-#   ifdef __FreeBSD__
+-	{
+-		/*
+-		 * We Must disable ASLR stack gap on FreeBSD to avoid a
+-		 * segfault. See PR/241421 and PR/241960.
+-		 */
+-		int aslr_var = PROC_STACKGAP_DISABLE;
+-
+-		pid_t my_pid = getpid();
+-		procctl(P_PID, my_pid, PROC_STACKGAP_CTL, &aslr_var); 
+-	}
+-#   endif
+ 	return ntpdmain(argc, argv);
+ }
+ #endif /* !SYS_WINNT */