Log Message:
(ham/xnec2c) Updated 4.2.1 to 4.2.3

(From doc/xnec2c.html)
Version 4.2.2:

   Fixed a bug in the fbar() in somnec.c reported by Ward Harriman,
   AE6TY, that caused corrupt results with wire dipoles close to ground
   and while using Sommerfeld/Norton approximation.

Version 4.2.3:

   Fixed a bug in Child_Process() in fork.c which resulted in an
   out-of-bounds (by 1) write to the rc_config.input_file[] character
   array.