Integrate perlio:
Jarkko Hietaniemi [Mon, 26 Mar 2001 18:37:52 +0000 (18:37 +0000)]
[  9361]
Implement flush of linebuffered streams on read of a tty.

[  9360]
Memory tweaks and notes for OEMVS.

p4raw-link: @9361 on //depot/perlio: a9c883f63197ffe78a9fa90fb454b99d9d4027c2
p4raw-link: @9360 on //depot/perlio: 9133bbab1b418762e5735878fdd7f85407fdd45a

p4raw-id: //depot/perl@9362


Trivial merge