Integrate perlio:
Jarkko Hietaniemi [Tue, 12 Dec 2000 19:28:11 +0000 (19:28 +0000)]
[  8091]
Fix for Tk, and upgrading shared SVs.

p4raw-link: @8091 on //depot/perlio: 8a8183332d9a42d93d66e4028ccb28fd2bda82d8

p4raw-id: //depot/perl@8092


Trivial merge