Merge branch 'main' into issue120-scpclient-timeout-config

trollmoves/movers.py

@@ -37,6 +37,10 @@
 from ftplib import FTP, all_errors, error_perm
 from paramiko import SSHClient, SSHException, AutoAddPolicy
 from scp import SCPClient, SCPException
+try:
+    from s3fs import S3FileSystem
+except ImportError:
+    S3FileSystem = None
 
 from trollmoves.utils import clean_url