peak: fix type of uint64_t to (unsigned long long)

clang wholeheartedly disagrees on this between OSX and FreeBSD.
*: /usr/local/sbin for binaries; libnetmap is no more
output: remove my horrible asprintf() hack
alloc: audit, tweaks and more

* malign() was changed to calloc()-style, without the memory zero
* -DWANT_UNGUARDED can be used to disable allocation checks
* proper malign()/malloc()/calloc() overflow checks
* zalloc() has been zapped in favour of calloc()
* zalign() has been zapped (nobody used it)

calloc()-overflow-guard-bits-taken-from: OpenBSD