notes: add refresh davmail token info

notes/davmail.md

@@ -0,0 +1,19 @@
+# Davmail
+
+## Update refresh token
+
+Stop current `davmail.service` and clone properties to a temp file
+
+```sh
+sudo systemctl stop davmail.service
+cat $(sudo systemctl cat davmail.service | awk '/ExecStart=/ { print $2; }') > /tmp/davmail.properties
+```
+
+Start davmail manually
+
+```sh
+davmail /tmp/davmail.properties
+```
+
+Open renew link in the browser and copy `refreshToken` from
+`/tmp/davmail.properties`