dispvm: pass VM name to qrexec-daemon
dispvm: pass VM name to qrexec-daemon

Now qrexec-daemon requires three arguments: domid, domname,
default_user.

QubesOS/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin,QubesOS/qubes-core-admin,marmarek/qubes-core-admin,marmarek/qubes-core-admin,woju/qubes-core-admin,QubesOS/qubes-core-admin,woju/qubes-core-admin,marmarek/qubes-core-admin