* fts-flatcurve: inital implementation
* fts: removed solr from compose.yml
* flatcurve: added heap and proc logic to dovecot
* added logic for update.sh & generate for Flatcurve
* delete old iteration of fts-flatcurve.conf
* updated default fts.conf
* updated .gitignore to exclude fts.conf for further git updates
* Remove autogeneration of fts.conf (disable override)
* cleanup all left solr stuff
* renamed SKIP_FLATCURVE to SKIP_FTS
* cleanup leftovers solr in lang files
* moved lazy_expunge plugin only to mail_plugins
* added fts timeout value
* compose: remove dev image of dovecot
* updated japanese translation
