docs/168814: [patch] remove `d` negative pointer EINVAL requirement from read(2)

[bdrewery at FreeBSD.org]

Synopsis: [patch] remove `d` negative pointer EINVAL requirement from read(2)

State-Changed-From-To: open->closed
State-Changed-By: bdrewery
State-Changed-When: Thu Mar 27 05:56:50 CDT 2014
State-Changed-Why: 
It looks like uiomove() will return EINVAL on negative offset, and I did
find tmpfs_read returning EINVAL on negative offset as well.

http://www.freebsd.org/cgi/query-pr.cgi?pr=168814