Update golang.org/x/crypto commit hash to 5ea612d

See merge request !7

Update module miekg/dns to v1.1.40

See merge request !9

Update module miekg/dns to v1.1.39

See merge request !8

Update module miekg/dns to v1.1.38

See merge request !6

Update module miekg/dns to v1.1.37

See merge request !5

Update module miekg/dns to v1.1.35

See merge request !3

Update module yaml to v2.4.0

See merge request !4

Configure Renovate

See merge request !2

This is useful for, e.g. OCSP stapling.

Switch to certbot pem names

See merge request !1

Easier to swap between the two.

Support multiple config_dirs, name all paths explicitly instead of
simply using predefined subdirectories.