Changes in current version:
+ o free minheap on event_base_free(); from Christopher Layne
+
+Changes in 1.4.0:
o allow \r or \n individually to separate HTTP headers instead of the standard "\r\n"; from Charles Kerr.
o demote most http warnings to debug messages
o Fix Solaris compilation; from Magne Mahre
for (i=0; i < base->nactivequeues; ++i)
assert(TAILQ_EMPTY(base->activequeues[i]));
assert(min_heap_empty(&base->timeheap));
+ min_heap_dtor(&base->timeheap);
for (i = 0; i < base->nactivequeues; ++i)
free(base->activequeues[i]);