Commit Briefs
libventi: fix segfault in vtgetreq
Don't call vtlog() when _vtqrecv() returns nil on queue hangup, as reported on http://bitbucket.org/rsc/plan9port/issue/102/ R=rsc http://codereview.appspot.com/6373046
add -W to specify window size.
various other little fixes.
Small tweaks
Lots of new code imported.