Integrate perlio:

[ 16297]
Remove "spurious" (and unnecessary) variables from layer_syms
Win32 (Win2k), MinGW-1.1 - passes all tests! ;-)

[ 16296]
perl embed.pl to update global.sym
p4raw-link: @16297 on //depot/perlio: ad6971c848a6c9ababdb3d314df9138e0a0f49d9
p4raw-link: @16296 on //depot/perlio: d3fc1a44058d12315bd16e49f8c7fd1469fd6d9d

p4raw-id: //depot/perl@16299