More explanatory error message from Listen (#4534)
More explanatory error message from Listen (#4534)

* explain cryptic unix socket listener error related to process kill

https://github.com/caddyserver/caddy/pull/4533

* less ambiguous wording: clean up -> delete

* shorten error message explanation

* link back to pull request in comment for later archeaology
l3dlp/caddy,mholt/caddy,l3dlp/caddy,mholt/caddy,l3dlp/caddy