Hello all,

Sent to CTAN today is an update with the following changes

 - Update l3keys such that key properties are additive,
   introducing a new .undefine: property to support this
   and altering .value_forbidden:/.value_required: to
   .value_forbidden:n/.value_required:n
 - Fix detokenization of key names in some parts of l3keys
 - Update to l3keys2e to correctly find key names following
   l3keys fix
 - Fix extraction of \l_keys_key_tl from \l_keys_path_tl
 - Update case changing data for Unicode 8.0.0
 - Reintroduce minimal LuaTeX-specific functions as l3luatex
 - Remove function deprecated during 2012 and 2013
 - Extend saving of primitive (\<engine>_<name>:D)
   to cover all XeTeX and LuaTeX names including
   those for Unicode math handling

As usual, please give CTAN 48 h to install and for changes to propagate.
--
Joseph Wright