* use fewer entities, browsers don't support all either.
* update to generate code for new entconv.
* no need for configure, use just a simple Makefile
(it is an internal tool)
libclamav/entconv.c, hashtab.c, htmlnorm.c:
* don't allocate memory for each entity_norm call.
* don't touch length of mmaped area (bb #785)
* update htmlnorm to use new entity_norm
git-svn: trunk@3515
