Revert "package/openssh: disable async-signal-unsafe code in sshsigdie()"

This reverts commit ecc0c1fb1244971b2dad96ef2ef886daa80c72fd.

We will instead bump to openssh 9.8.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openssh/0002-sshsigdie-async-signal-unsafe.patch

@@ -1,41 +0,0 @@
-From 7f4a743171f9e6b283207d448de6562219774fbf Mon Sep 17 00:00:00 2001
-From: Salvatore Bonaccorso <carnil@debian.org>
-Date: Tue, 25 Jun 2024 12:24:29 +0100
-Subject: Disable async-signal-unsafe code from the sshsigdie() function
-
-Address signal handler race condition: if a client does not authenticate
-within LoginGraceTime seconds (120 by default, 600 in old OpenSSH
-versions), then sshd's SIGALRM handler is called asynchronously, but
-this signal handler calls various functions that are not
-async-signal-safe (for example, syslog()).
-
-This is a regression from CVE-2006-5051 ("Signal handler race condition
-in OpenSSH before 4.4 allows remote attackers to cause a denial of
-service (crash), and possibly execute arbitrary code")
-
-Signed-off-by: Salvatore Bonaccorso <carnil@debian.org>
-Upstream: https://salsa.debian.org/ssh-team/openssh/-/blob/525bb16e45edac4c03b95e106380d70aecbaf27e/debian/patches/sshsigdie-async-signal-unsafe.patch
-Patch-Name: sshsigdie-async-signal-unsafe.patch
----
- log.c | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/log.c b/log.c
-index 6a8b1fc4a..57256660f 100644
---- a/log.c
-+++ b/log.c
-@@ -452,12 +452,14 @@ void
- sshsigdie(const char *file, const char *func, int line, int showfunc,
-     LogLevel level, const char *suffix, const char *fmt, ...)
- {
-+#if 0
- 	va_list args;
- 
- 	va_start(args, fmt);
- 	sshlogv(file, func, line, showfunc, SYSLOG_LEVEL_FATAL,
- 	    suffix, fmt, args);
- 	va_end(args);
-+#endif
- 	_exit(1);
- }
-