Import newer htpdate.

Changes:
  1cce4e6 Clarify what happens if --proxy is not used.

config/chroot_local-includes/usr/local/sbin/htpdate

@@ -98,7 +98,7 @@ sub parseCommandLine () {
         [ 'neutral_pool=s@', "neutral hostnames" ],
         [ 'foe_pool=s@', "distrusted hostnames" ],
         [ 'allowed_per_pool_failure_ratio:f', "ratio (0.0-1.0) of allowed per-pool failure", { default => 1.0 } ],
-        [ 'proxy|p:s', "what to pass to curl's --socks5-hostname" ],
+        [ 'proxy|p:s', "what to pass to curl's --socks5-hostname (if unset, environment variables may affect curl's behavior -- see curl(1) for details)" ],
     );
 
     usage() if $opt->help;