translation update
Update lang.php

Microfix
Update index.php

1 typo
AUTH_USER_CHANGE handler can modify passed data

Originally AUTH_USER_CHANGE handler could modify the user data, however,
auth plugin consequently worked with different copy of the array thus
effectively preventing any changes by the AUTH_USER_CHANGE implementer.
another fix for broken gzlib linking #865
Merge pull request #898 from Werkov/master

AUTH_USER_CHANGE handler can modify passed data
Merge pull request #876 from dokuwiki-translate/lang_update_53

Translation update (hr)
Merge pull request #879 from Dr-Yukon/patch-2

Update lang.php
Merge pull request #880 from Dr-Yukon/patch-3

Update index.php
new PHP minimum requirement is now 5.3.3

that's the version in Debian old stable