Integrate perlio:
Jarkko Hietaniemi [Tue, 10 Jul 2001 12:59:27 +0000 (12:59 +0000)]
[ 11252]
Fix open(...,"...:layer(xxx)",...)
- use memEQ not strEQ as there is '(' not '\0'

[ 11063]
Quick for for #ifdef mess

p4raw-link: @11252 on //depot/perlio: 4cddb5cd9c04fc106c6cfb974a57915742687c3a
p4raw-link: @11063 on //depot/perlio: 9ed1afdbc1bed7621d245b873ba48f50bcb0f262

p4raw-id: //depot/perl@11253


Trivial merge