updated version and copyright
updated pattern for Cisco IOS images to support a wider range of image files
updated SCP SCP command deal with OpenSSH 9 change to new sftp engine
ensure date returns US English date formats
stop forcing upload of startup-config to nvram (honor config variable)
- scp and ssh actions that fail (i.e. host not available) will now generate an error message (fixes#6)
- default pattern for universal IOS images now also supports provisional images (fixes#8)
resolved issue with determining upon upload whether we're dealing with the startup-config, this is now based on the destination file name (which is correct), fixes#5
