Merge tag '5.1.1' into samk

feat: certbot_extra_opts

PR geerlingguy#109 Follow-up: Document new variable inside other vari…

…able.

Merge pull request geerlingguy#192 from fapdash/patch-1

Run hooks only for standalone mode

Remove deprecated warn arg from command and shell module invocations.

Merge pull request geerlingguy#166 from tobiashuste/fix-snap-initial-…

…dry-run

Fix snap symlink task failing in initial dry-run

Tabs to spaces in README.

Merge pull request geerlingguy#152 from stackbuilders/fix_install_wit…

…h_snap_debian

[geerlingguy#151] Skip "Enable classic snap support" on Debian

PR geerlingguy#80 touch-up for cosmetic purposes.

Merge pull request geerlingguy#142 from geerlingguy/134-snap-install-…

…method

Issue geerlingguy#134: Snap install method.