fix some memory issues

* getaddrinfo is alread allocating the addrinfo struct so we get a
  (quiet small) memory hole
* now checking if malloc failed for whatever reason
* TODO if I startup a varnish and put all traffic at once on it the
  freeaddrinfo is failing (in libjemalloc/jemalloc_linux.c) and I
  don't know why. Probably this is a bug in the libjemalloc but I'm
  not sure about that.
Merge pull request #4 from Savar/fix_memory_stuff

fix some memory issues
* BSD needs netinet/in.h explicitly added
update install instructions
* zero out the hints struct using memset. Addresses https://github.com/jib/libvmod-statsd/pull/5
* add additional diagnostics
* prefix all debug messages with vmod-statsd
Merge pull request #6 from jib/freeaddrinfo-segfaults

* zero out the hints struct using memset. Addresses https://github.com/j...
fix issue where reload stops sending stats
Update LICENSE
Merge pull request #7 from Frick/reload-issue

fix issue where reload stops sending stats