configure.in: cut down to just the required tests. Support for installation.

Makefile.in: support for installation.

conffile.c: deal with line numbers from included conffiles correctly

dh.c: change format to binary from decimal string

netlink.c: done. Test tun-old code.

random.c: test

resolver.c: done

rsa.c: check padding type, change format to binary from decimal string

secnet.c: done

site.c: the site_incoming() routing could be implemented much more
cleanly using a table. There's still quite a lot of redundancy in this
file.

transform.c: done

udp.c: done

util.c: sort out logging