[sr-dev] script callbacks

[Miklos Tirpak]

Hi Andrei,

could you please have a look at the tirpi/script_callbacks branch?

There are some modules that need to initialize their variables before, 
or free/unlock/unref,... something after the script executions. This is 
supported only for request and onreply routes, but it is necessary also 
before/after failure routes in some cases. (For example db_ops needs to 
free the query result.) So I started to add support for pre- and 
post-script callbacks for failure routes. But instead of simply adding 
another list to the core I generalized the API a bit to support any kind 
of route blocks, and added hooks also for branch and onsend routes. 
Please let me know whether I can merge my branch to the master.

Daniel: shall I add a hook around modules_k/htable/htable.c:187 for 
event_route?

Thanks,
Miklos