lucene.xml misses info about Lucene diacritics=yes/no option

[joewiz]

See http://markmail.org/message/mqladaa6ey2s73b5

[joewiz]

Missing from http://exist-db.org/exist/apps/doc/lucene.xml.

[duncdrum]

@wolfgangmm if this is still available to users, would you mind either adding a new PR or push another change to the open Facets PR closing this issue. thx