Fix locking

Or maybe break it further.

web/system.py

@@ -52,7 +52,7 @@ def save_config():
             version = settings['version'] = int(settings.get('version', 0)) + 1
 
             # Populate IP sets.
-            wireguard = db.read('wireguard')
+            wireguard = db.load('wireguard')
             ipsets = collections.defaultdict(set)
             for ip, key in wireguard.items():
                 for group in user_groups.get(key.get('user', ''), ()):
@@ -137,6 +137,8 @@ def generate():
 @click.option('--version', '-v', type=click.INT, default=None, help="Config version to push")
 @flask.cli.with_appcontext
 def push(version=None):
+    try:
+        with db.locked('nodes'):
             if version is None:
                 version = db.load('settings').get('version', 0)
 
@@ -144,8 +146,6 @@ def push(version=None):
             with open('config/version', 'w') as f:
                 print(version, file=f)
 
-    try:
-        with db.locked('nodes'):
             nodes = db.read('nodes')
             tarfile = f'config/{version}.tar.gz'