Fix channels used by WaitWrite (http server hangs on writes which hit EAGAIN).
Fix channels used by WaitWrite (http server hangs on writes
which hit EAGAIN).

R=rsc
APPROVED=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=27955
CL=28054

npe9/noahevans-go9,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,d0f/go-zh,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1,webfd/go-zh,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,webfd/go-zh,rdp/rogerpack2005-golang,webfd/go-zh,scirelli/scirelli-go,mhennings/marcohennings-go,rflanagan/reginaldflanagan-project1,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,scirelli/scirelli-go,npe9/noahevans-go9,mhennings/marcohennings-go,npe9/noahevans-go9,bryanxu/go-zh,bryanxu/go-zh,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,d0f/go-zh,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,mhennings/marcohennings-go,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,mhennings/marcohennings-go,d0f/go-zh,rflanagan/reginaldflanagan-project1,bryanxu/go-zh,Triskite/willstone-goclone,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,scirelli/scirelli-go,d0f/go-zh,bryanxu/go-zh,webfd/go-zh,sanjosh/sanjos100-tipc,scirelli/scirelli-go,d0f/go-zh,glycerine/jeaten-go-arrayof-structof,webfd/go-zh,sanjosh/sanjos100-tipc,npe9/noahevans-go9,Triskite/willstone-goclone,glycerine/jeaten-go-arrayof-structof,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,npe9/noahevans-go9,d0f/go-zh,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,sanjosh/sanjos100-tipc,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,bryanxu/go-zh,bryanxu/go-zh,npe9/noahevans-go9,rdp/rogerpack2005-golang,mhennings/marcohennings-go,rdp/rogerpack2005-golang,scirelli/scirelli-go,Triskite/willstone-goclone,webfd/go-zh,d0f/go-zh,scirelli/scirelli-go,bryanxu/go-zh,d0f/go-zh,scirelli/scirelli-go,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1