Log Message:
To quote from the Changelog for 0.7.5 of awka:

v 0.7.5, June 20 2001

*  Gawk 3.1.0's Coprocessing and inet functions are now supported by Awka,
   as are the new builtin functions asort() and mktime().  Thanks to Juergen
   Kahrs for the original work to implement this excellent feature, and to
   Arnold Robbins for including it in Gawk.  That libawka will now be
   distributed under the GNU General Public License (GPL) rather than
   LGPL as a result of having to include some code from Gawk.  The previously
   separate dfa library is now absorbed into libawka, and the -d command-line
   option for awka removed as it is no longer needed.

so revise the PLIST, removing dfa.h and libdfa.a accordingly