Fix TLSProxy race by adding missing eval

Reviewed-by: Richard Levitte <levitte@openssl.org>

util/TLSProxy/Proxy.pm

@@ -226,12 +226,14 @@ sub clientstart
     do {
         my $servaddr = $self->server_addr;
         $servaddr =~ s/[\[\]]//g; # Remove [ and ]
+        eval {
             $server_sock = $IP_factory->(
                 PeerAddr => $servaddr,
                 PeerPort => $self->server_port,
                 MultiHomed => 1,
                 Proto => 'tcp'
             );
+        };
 
         $retry--;
         if ($@ || !defined($server_sock)) {