Refactor how translations are used and loaded. Property `web.langs.customfiles.path` must point to the
RersourceBundle, without the `_lang.properties" extensions. An examle
location, if we have files `/etc/props_en.properties` and
`/etc/props_cs.properties`, the correct value for the configuration
option is `web.langs.customfiles.path=/etc/props`.
BREAKING CHANGE: Property `web.langs.customfiles.path` must point to the
RersourceBundle.
Via property _saml.internalReferrers_ it can be configured which
referrers are considered as internal and in such a cases session will
not be invalidated. The property has to be list of URLs, separated by a
comma, and the matching is done as a prefix of the current referrer