Note that we've made two subtle mistakes: we are supposed to suffix
any non-released version with "-dev", and we're supposed to use the
last byte of the numeric version to indicate whether we have done this.
For example, when 2.0.4-alpha is released, its numeric versin will be
0x 02 00 04 00. As soon as we tag it, we will change the version in
the git repository to 2.0.4-alpha-dev, whose numeric version will be
0x 02 00 04 01 or something.
The entry points are evutil_getaddrinfo and evdns_getaddrinfo respectively.
There are fairly extensive unit tests.
I believe this code conforms to RFC3493 pretty closely, but there are
probably more issues. It should get tested on more platforms.
This code means we can dump the well-intentioned but weirdly-implemented
bufferevent_evdns and evutil_resolve code.
svn:r1537
