MEDIUM: http/tcp: permit to resume http and tcp custom actions

MEDIUM: http/tcp: permit to resume http and tcp custom actions

Later, the processing of some actions needs to be interrupted and resumed
later. This patch permit to resume the actions. The actions that needs
to run with the resume mode are not yet avalaible. It will be soon with
Lua patches. So the code added by this patch is untestable for the moment.

The list of "tcp_exec_req_rules" cannot resme because is called by the
unresumable function "accept_session".