change s3 environment variable

dbman/main.py

@@ -85,8 +85,8 @@ def get_remote_databases_directory(args):
     web_dir = 's3://db_storage'
     if args.store:
         web_dir = args.store
-    elif 'S3_DBDIR' in os.environ:
-        web_dir = os.environ['S3_DBDIR']
+    elif 'DBMAN_S3DIR' in os.environ:
+        web_dir = os.environ['DBMAN_S3DIR']
     return web_dir