remove most of Ip_address: and depend on ocaml-ipaddr
fix previous commit
update README
opam
ocsigenserver: implement "Expect: 100-continue" support

Match the expect header case insensitively, and send a 100-continue header.
This makes the PUT query in a64f168cd57f4276cd1d6d698d18f290a6835a9c actually
useful.

The code was tested on top of ocsigenserver-2.2.0 for quite some time,
as shown by the original commit date.
Adding Makdefile.dist + tagging 2.3.0
Merge pull request #20 from edwintorok/put_100continue

ocsigenserver: implement "Expect: 100-continue" support
Merge branch 'ipaddr' of https://github.com/hhugo/ocsigenserver into hhugo-ipaddr

Conflicts:
	README
Merge branch 'master' of https://github.com/ocsigen/ocsigenserver
Dependencies in README and opam
Fix the doc compilation by adding ipaddr to the packages