- exceptions get now always logged to the error_log
- in the webgui it's now configurable, if the message contains a
stacktrace (incl. function arguments) - default no (security)
- command line interfaces get detected and contain no html anymore
- webdav and groupdav send the exceptions as basic auth realms to the
client
- webdav and groupdav login failures contain the reason as part of the
basic auth realm
-removed the manual setting of the link to the emailadmin, and moved it to emailadmin's hooks
-support the (user/group id change for emailadmin table/fields
