CLEANUP: wurfl: removed deprecated methods

last 2 major releases of libwurfl included a complete review of engine options with
the result of deprecating many features. The patch removes unecessary code and fixes
the documentation.
Can be backported on any version of haproxy.

[wt: must not be backported since it removes config keywords and would
 thus break existing configurations]
Signed-off-by: Willy Tarreau <w@1wt.eu>
4 files changed