  regexp/utf8.[ch] (see regexp/LICENSE):

  (c) 2010-2016 Steve Bennett <steveb@workware.net.au>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above
     copyright notice, this list of conditions and the following
     disclaimer in the documentation and/or other materials
     provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  The views and conclusions contained in the software and documentation
  are those of the authors and should not be interpreted as representing
  official policies, either expressed or implied, of the Jim Tcl Project.
