FreeBSD capsicum / timezones

[Ed Maste]

Part of FreeBSD commit r339216 / fc3c19a9fceeea48a9259ac3833a125804342c0e

    * Cache timezone data via caph_cache_tzdata() as we cannot access the
      timezone file.

caph_cache_tzdata exists in all supported FreeBSD versions (12.0+, and
11.2 and later), although I suspect there is a desire to build OpenSSH
on older versions as well. This could be addressed with an autoconf
check for the existence of capsicum_helpers.h -- I'll create a patch
for that, if desired.

diff --git a/crypto/openssh/sandbox-capsicum.c
b/crypto/openssh/sandbox-capsicum.c
index 5f41d526292b..f728abd18250 100644
--- a/crypto/openssh/sandbox-capsicum.c
+++ b/crypto/openssh/sandbox-capsicum.c
@@ -31,6 +31,7 @@ __RCSID("$FreeBSD$");
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <capsicum_helpers.h>

 #include "log.h"
 #include "monitor.h"
@@ -71,6 +72,8 @@ ssh_sandbox_child(struct ssh_sandbox *box)
        struct rlimit rl_zero;
        cap_rights_t rights;

+       caph_cache_tzdata();
+
        rl_zero.rlim_cur = rl_zero.rlim_max = 0;

        if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1)