Eliom: comet client: protect comet streams from cancels
Eliom: comet client: protect comet streams from cancels

Ignore-this: 88903da4fe5303d9fb4b18db80d6320c

darcs-hash:20110201173749-0cb73-aa99f9d80f80b4e6ef92c3198742da6a16958b43

mfp/ocsigenserver,mfp/ocsigenserver