Kailash Nadh 583dab4bc6 Add support for per-campaign custom headers. ... - Add new `headers[]` column to the campain table. - Add new headers box to the campaign UI that takes a JSON array of custom headers like the headers on the SMTP settings UI. - Headers are added to e-mails and messenger postback webhooks. - Add cypress tests. Closes #514.		2022-01-04 22:27:40 +05:30
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models.go	Add support for per-campaign custom headers.	2022-01-04 22:27:40 +05:30