Bug 945912 - Add crashtest for libpng crash. r=ryanvm
Bug 860254 - Part 1: #define MALLOC_FILL but keep the options const-false. r=glandium
Bug 860254 - Part 2: Split junk settings into opt_junk (allocate) versus opt_poison (deallocate). r=glandium
Bug 860254 - Part 4: Enable poisoning. r=glandium