Migrating to Autoconf + Automake, first attempt.
I don't really expect it to work when src != build != install directories.
Added the userspace app's man page.
Also tested a bit. It does work with different directories.
Added a bunch of doc to the installation of the userspace app.
Added ipv6 prefix validation.
Removed prefix length validation, because is validated when validating the prefix.
improved init() when something goes wrong to avoid kernel crash, also improved verify_prefix method in pool6
Code revision. Made a couple of minor adjustments to the issue77 fix.
Merge branch 'issue76'
We still don't have the site's certificates, so I'm downgrading the https in the meantime.