Backport vhost-user-vsock networking #1207

Job	Run time
test_installer	48m 16s
test_installer	48m 33s
build_container	2s
build_container	10m 0s
build_and_check_fork	0s
build_and_check_fork	0s
sym_trace_tests	0s
make_check	0s
taint_tests	0s
pypanda_tests	0s
cleanup	2s
cleanup	2s
pypanda_tests (dyn_hooks)	11s
pypanda_tests (copy_test)	15s
sym_trace_tests (x86_64)	7s
taint_tests (i386)	58m 24s
pypanda_tests (file_fake)	8s
make_check (check-qtest-x86_64)	1m 22s
taint_tests (x86_64)	7m 18s
pypanda_tests (file_hook)	8s
make_check (check-qtest-i386)	1m 55s
pypanda_tests (generic_tests)	1m 55s
make_check (check-qtest-arm)	1m 17s
pypanda_tests (monitor_cmds)	9s
make_check (check-qtest-mips)	41s
pypanda_tests (multi_proc_cbs)	16s
make_check (check-qtest-mipsel)	38s
pypanda_tests (sleep_in_cb)	6s
make_check (check-qtest-ppc)	50s
pypanda_tests (syscalls)	8s
make_check (check-block)	1m 3s
pypanda_tests (record_no_snap)	13s
make_check (check-unit)	52s
pypanda_tests (sig_suppress)	19s
make_check (check-qapi-schema)	13s
	3h 5m 23s

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