* add rejected submissions redirect option * add prometheus metrics on /metrics endpoint with basic auth * add `email` and `domain` values (if present within submission) to matrix event properties * fix rare case with nil postmark client * migrate to mautrix-go 0.17.x * lower validator log level to warn * do not ban for technical endpoints (like /metrics) * customizable message template * support json submissions (Content-Type: application/json) * submissions are sent with `m.notice` msg type new env vars: * BUSCARRON_NAME_REDIRECT_REJECT * BUSCARRON_NAME_RATELIMIT_SHARED (missed in v1.3.1) * BUSCARRON_NAME_TEXT removed env vars: * BUSCARRON_NOENCRYPTION