vsock-util: allow VMADDR_CID_ANY as local CID if enabled in hwdb

On Hyper-V guests, `VMADDR_CID_ANY` is valid as per implementation in
kernel driver: net/vmw_vsock/hyperv_transport.c.

Fixes https://github.com/systemd/systemd/issues/42496

Follow-up for 83359c4da0

src/ssh-generator/ssh-util.c

@@ -5,8 +5,8 @@
 
 #include "errno-util.h"
 #include "log.h"
-#include "socket-util.h"
 #include "ssh-util.h"
+#include "vsock-util.h"
 
 int vsock_open_or_warn(int *ret) {
         int fd = RET_NERRNO(socket(AF_VSOCK, SOCK_STREAM|SOCK_CLOEXEC, 0));