Check set[e]uid return code
Wipe the whole buffer containing the DNS name, not the size of its pointer
Fix NULL pointer deref
-R only works on OpenBSD.
snprintf() is a macro on some operating systems
and having #ifdef statements in macro parameters has undefined behavior.
size_t values can't be negative.
Merge branch 'master' of https://github.com/jedisct1/iodine