In Solaris 2.4 a bug was introduced that makes tftpboot chroot,
while it still needs to open a socket. The first request still
gets a response, but all other requests meet with a 5 second delay.
mknod /tftpboot/dev/udp c 11 41
chmod 755 /tftpboot/dev; chmod 666 /tftpboot/dev/udp
This is fixed with patch 102773-01 (sparc) and 102774-01 (x86).