kunsi-p14s: add dataset for movies

Having them on a separate dataset away from the usual data allows us to
easily exclude them from backups and snapshots - they are done at the
source, no need to do them here, too.

nodes/kunsi-p14s.py

@@ -157,6 +157,9 @@ nodes['kunsi-p14s'] = {
                     'xattr': 'sa',
                     # encryption is enabled, too.
                 },
+                'zroot/movies': {
+                    'mountpoint': '/media/movies',
+                },
                 'zroot/system/journal': {
                     'mountpoint': '/var/log/journal',
                     'acltype': 'posix',
@@ -183,6 +186,7 @@ nodes['kunsi-p14s'] = {
                     },
                 },
                 'snapshot_never': {
+                    'zroot/movies',
                     'zroot/system/journal',
                 },
             },