Script exits unexpectedly if old configs detected

[ajn142]

Per my testing, the existence of any config file that contains “wg0.conf” causes the script to exit, including old files that have been renamed e.g. wg0.conf.old or wg0.conf.bak.

Pretty sure this is any easy fix to adjust the grep check, I’ll try fixing that in my copy and put in a PR with adjustments if so.

[ugurrdemirel]

Thanks for contribution mate <3