Fix Sys::Syslog slowness when logging with non-native mechanisms. (Closes: #498776)

Revert the 0.25 second timeout change that was added in 0.19 to address
an OSX problem with UDP sockets and ICMP responses.

Fixed upstream in Sys::Syslog 0.25, which changes the timeout default
to 0 again on non-OSX hosts and makes it configurable with setlogsock().
diff --git a/ext/Sys/Syslog/Syslog.pm b/ext/Sys/Syslog/Syslog.pm
index 899f25b..7037e18 100644
--- a/ext/Sys/Syslog/Syslog.pm
+++ b/ext/Sys/Syslog/Syslog.pm
@@ -741,7 +741,7 @@ sub connection_ok {
 
     my $rin = '';
     vec($rin, fileno(SYSLOG), 1) = 1;
-    my $ret = select $rin, undef, $rin, 0.25;
+    my $ret = select $rin, undef, $rin, 0;
     return ($ret ? 0 : 1);
 }