9bca989183
This reworks varlink_collect() so that it is not just a wrapper around varlink_observe(), varlink_bind_reply() and others. It becomes a first class operation. This has various benefits: 1. Memory management is normalized: the reply json variant is now tracked as part of the varlink object, and thus we do not pass ownership to the caller. This is just like we do it for simple method calls and removes a lot of confusion. 2. The bind reply/user data pointer can be used for user stuff, we'll not silently override this. 3. We enforce an overall time-out operation on the whole thing, so that this synchronous operation does no longer block forever.
System and Service Manager
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