TYPO3 Core

The RTE option "proc.disableUnifyLineBreaks" was never
set by default.

If NOT set (= default), then all line breaks within the
RteHtmlParser are converted as LF, and then migrated
to CRLFs after all transformations are done.

Activating the option did not do that, thus having problems
when content was entered on different OSes (Windows / Unix)
and leaving with mixed line break data in the database, the
option was historically added to stay compatible with old
versions where the unification was not available yet.