meta.sr.ht: drop py3-pystache

meta.sr.ht: upgrade to 0.53.15

*.sr.ht: move nginx files

meta.sr.ht: add py3-dnspython dependency

meta.sr.ht-nginx: add sr.ht-nginx dependency

meta.sr.ht: add -nginx subpackage

meta.sr.ht: overhaul init files

meta.sr.ht: add API service

meta.sr.ht: remove py3-prometheus-client dependency

This comes from py3-srht now

meta.sr.ht: move .billing location

sr.ht/meta.sr.ht: add -billing subpackage

meta.sr.ht: update to latest version

Update all dependency packages

Add zxcvbn to meta.sr.ht dependencies

Fix supervisor in meta.sr.ht init scripts

meta.sr.ht: normalize init scripts

Add webhooks init script to meta.sr.ht

Add -openrc, fix sources for meta.sr.ht

Update man.sr.ht.post-upgrade

Also moves alembic dependency to py3-srht

Add py3-prometheus-client to meta.sr.ht deps