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      1 Copyright (c) 1980 Regents of the University of California.  
      2 All rights reserved.
      3 
      4 Redistribution and use in source and binary forms, with or without
      5 modification, are permitted provided that the following conditions are
      6 met:
      7 
      8     1. Redistributions of source code must retain the above copyright
      9        notice, this list of conditions and the following disclaimer.
     10     2. Redistributions in binary form must reproduce the above
     11        copyright notice, this list of conditions and the following
     12        disclaimer in the documentation and/or other materials provided
     13        with the distribution.
     14     3. All advertising materials mentioning features or use of this
     15        software must display the following acknowledgement:
     16            This product includes software developed by the University
     17            of California, Berkeley and its contributors.
     18     4. Neither the name of the University nor the names of its
     19        contributors may be used to endorse or promote products derived
     20        from this software without specific prior written permission.
     21 
     22 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
     23 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     25 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33