Set permissions on put

[Zeitsperre]

This is a really great library. Thanks for your work maintaining this!

I'd like to see a method of setting permissions for files once they've been transferred. There seems to be some work within the putfo method, but it would be great if I could set a flag within my scp class instance or when calling the put method (e.g. scp.put(file1, server/path/to/file1_copy, mode='0644')).

[remram44]

I am reluctant to add it to put() since it makes no sense with directories. May be just show an error if mode is not None and recursive is True?

[Zeitsperre]

That would work well. I understand that the use case may be limited, but it could be set as an optional signature and It would certainly be more intuitive than having to perform an ssh.exec_command(f"chmod ... {file}") after a file transfer is done.

[sindhujit1]

I would also like this improvement to be added. May be not for directories but atleast would be useful when copying individual files. @remram44 what do you mean by:
May be just show an error if mode is not None and recursive is True?