This patch just brings 'PIDS_IO' source into alignment
with the names being used in that /proc/<pid>/io file.
[ i had my chance to fix them in a whitespace change ]
[ made in the patch referenced below, but i blew it! ]
Reference(s):
commit 2dcbe71f3b8e3586acab0221b2e4c55d10cf8f76
Signed-off-by: Jim Warner <james.warner@comcast.net>