[syslinux] booting clonezilla *.iso via PXE fails

[Miller, Shao]

Sorry for all the e-mail, folks.

It just occurred to me that you might be encountering TFTP problems,
Helmut!  Perhaps the .ISOs are only partially downloaded, resulting in
fractional images in RAM!  Adding "pause" to the MEMDISK's APPEND
directive should allow for MEMDISK to report the sizes of things,
including the .ISO "initrd" that was passed to it by PXELINUX.

- Shao Miller