Small fixups to pty reversal to make work on Linux.

scripts/mosh

@@ -193,9 +193,9 @@ my $pid = fork;
 die "$0: fork: $!\n" unless ( defined $pid );
 if ( $pid == 0 ) { # child
   $pty->close_slave();
+  $pty->set_raw();
   open STDOUT, ">&", $pty or die;
   open STDERR, ">&", $pty or die;
-  close $pty;
 
   my @server = ( 'new', '-s' );
 
@@ -218,6 +218,7 @@ if ( $pid == 0 ) { # child
   die "Cannot exec ssh: $!\n";
 } else { # server
   my ( $ip, $port, $key );
+  close $pty;
   LINE: while ( <$pty_slave> ) {
     chomp;
     if ( m{^MOSH IP } ) {