Integrate perlio:
Jarkko Hietaniemi [Tue, 18 Jun 2002 20:22:56 +0000 (20:22 +0000)]
[ 17280]
Slight improvement to :win32 layer

[ 17282]
More PerlIO doc tweaks - trying to make them document what
happens in current implementation while leaving way open
to "fixing" things.
p4raw-link: @17282 on //depot/perlio: 01e6739c7b8104181279fe94fb5488ec35b2ba1c
p4raw-link: @17280 on //depot/perlio: 755e775944b8eceb91d29ebca620c9e5cf122f30

p4raw-id: //depot/perl@17287


Trivial merge