Deregister all callbacks when disconnecting from libvirt.
Deregister all callbacks when we lose or close the connection to libvirt. This fixes a problem where goroutines with outstanding requests waiting for replies would block forever if the libvirt connection dies, whether because disconnect is called, or the libvirt daemon crashes or restarts.
* Generate the remaining consts.
There were a number of hand-written consts in go-libvirt, including flag
values for various libvirt functions. Remove these and generate them
instead, so that we now have a complete set, and the naming is
consistent. I used c-for-go to do this generation, but turned off any
cgo usage by the generated code - we don't want or need to introduce a
dependency on cgo just to get constants from C headers. All code is
still generated using 'go generate ./...', which now calls a wrapper
script for added robustness.
This change also returns to using Go types for flags for most libvirt
functions, instead of plain integers.
This updates the project README, removing the pre-production warning
and adding a note about the libvirt project's feelings surrounding
direct interaction with the RPC interface.
