bridge (dbus/frontend): reintrospect signature in case of guess error: When a "Unable to guess signature […]" `ValueError` is raised during a method call, the signatures are re-introspected. This should fix this issue when a frontend is launched just after to the backend (this happens notably with tests).

#!/bin/bash
set -e

usermod -u "$(stat -c %u /var/lib/prosody/.)" prosody

if [[ "$1" != "prosody" ]]; then
    exec prosodyctl "$@"
    exit 0;
fi

if [ "$LOCAL" -a  "$PASSWORD" -a "$DOMAIN" ] ; then
    prosodyctl register "$LOCAL" "$DOMAIN" "$PASSWORD"
fi

exec runuser -u prosody -- "$@"