This reverts commit 8e729245.
Wine now requires a new enough flex version.

Revert "wrc: Use an EOF rule instead of lex_destroy for compatibility with prediluvian flex versions.".

This reverts commit 1405c00e.
Wine now requires a new enough flex version.

Wine needs a newer flex version than the prediluvian 2.5.4a.

We had to enable the Negotiate provider a while back so programs that expected 
that provider to be present would be happy. This broke programs that expect a 
Negotiate provider to actually do something if it is present. This fix works 
around that new issue by thunking all calls to Negotiate to NTLM.

Reported by Jacek Caban.