Custom tag per source and nick char filter for target

Detect ghost presence from DB instead of by looking for tag in nick

XEP-0410

Remove stale nicks that are no longer present on other side after restart

Replace mentioned nicks with their ghost equivalent

dhall version contraint

.gitignore

Store sessions in db

Allow Config to contain more than just the raw config file

Database connection, version, etc

Actually works with biboumi now

Initial commit