Fix kernel panic related to Comodo Antivirus

Zeroing out the vnode_attr struct in fuse_vnop_getattr tiggers a kernel
panic in kauth_authorize_action immediately after mounting a FUSE
volume. The panic seems to be caused by Comodo's kauth listener.

Backtrace:

    panic (in mach_kernel) (debug.c:353)
    kernel_trap (in mach_kernel) (trap.c:790)
    trap_from_kernel (in mach_kernel) + 38
    kauth_authorize_action (in mach_kernel) (kern_authorization.c:418)
    vnode_authorize (in mach_kernel) (vfs_subr.c:5760)
    getattrlist_internal (in mach_kernel) (vfs_attrlist.c:1442)
    getattrlist (in mach_kernel) (vfs_attrlist.c:2242)
    unix_syscall64 (in mach_kernel) (systemcalls.c:370)
    hndl_unix_scall64 (in mach_kernel) + 22
Update license