Portability fixes:
* Remove unecessary assertion of val<=0xffffffffUL where uint32_t val;
Closes: #394039 (FTBFS due to unhelpful GCC warning).
+ * Use -fno-strict-aliasing because gcc-4.3 apparently ignores
+ -Wno-strict-aliasing! Closes: #471004.
Internal improvements:
* Add a few assertions about *_LLEN in adns.c.