Bump dependency on network to 2.2.1.1
Bump dependency on network to 2.2.1.1

The version of network-2.2.1 that was released with GHC 6.10 differs
from the version on Hackage.  The version on Hackage contains API
additions needed by network-bytestring.  network-2.2.1.1 contains
those additions.

Mikehunan/network,Mikehunan/network,jspahrsummers/network,iquiw/network,iquiw/network