Add missing options to qvm-backup-restore doc.

doc/qvm-tools/qvm-backup-restore.rst

@@ -16,6 +16,8 @@ OPTIONS
 =======
 -h, --help
     Show this help message and exit
+--verify-only
+    Do not restore the data, only verify backup integrity
 --skip-broken
     Do not restore VMs that have missing templates or netvms
 --ignore-missing
@@ -32,6 +34,14 @@ OPTIONS
     Do not restore dom0 user home dir
 --ignore-username-mismatch
     Ignore dom0 username mismatch while restoring homedir
+-d APPVM, --dest-vm=APPVM
+    The AppVM to send backups to
+-e, --encrypted
+    The backup is encrypted
+-z, --compressed
+    The backup is compressed
+--debug
+    Enable (a lot of) debug output
 
 AUTHORS
 =======