Use sockets instead of port 9000

[KorvinSzanto]

This pr updates caddy and php-fpm to use a socket instead of port 9000. I figured if we were going to do this in the most straight forward way I might as well do the work. If you have different requirements I'd be happy to change my pr.

See #157 for reasoning behind this.

[drbyte]

Works for me.

Downside is the need to touch all existing Caddy *.dev files to make the change ...

[KorvinSzanto]

It's true this does require you run valet install again, not sure how to resolve that.

[adamwathan]

valet install will regenerate all TLS Caddyfiles so it shouldn't be a huge deal unless people have customized those files by hand, which I don't think I would really recommend because changes like this are not super uncommon in this early stage of the project.

I'd like to improve the upgrade process because right now it's not uncommon to have to blow out your whole ~/.valet folder when anything significant changes, but sort of the best we have right now.

[drbyte]

I'd like to improve the upgrade process because right now it's not uncommon to have to blow out your whole ~/.valet folder when anything significant changes, but sort of the best we have right now.

Ya, valet install always wipes out my custom dnsmasq.conf file :(