[PATCH] Purge macros NEED_EVENTS and NEED_REPLIES

[Fernando Carrijo]

Thus spake Alan Coopersmith, when questioned about NEED_EVENTS and NEED_REPLIES:

  "Long long ago,  X was built on  computers with 4Mb RAM. The  amount of memory
   used for the parse tables was large and if you didn't need it, then you saved
   time & memory  #ifdef'ing out the bits you didn't  need. Plus, some compilers
   sucked, life was hard, and the bits  had to be rolled uphill in the snow both
   ways. In other  words, ancient history that can be  deleted now unless you're
   really building a 15+ year old release."

This reviewer-friendly series of patches aims to purge both macros.