the rewrite of the retroshare core networking stack.
This check-in commits the changes to the pqi code,
and provides the majority of the improvements.
(1) Introduced new interfaces for DHT and UPnP abstraction: p3dhtmgr.h, p3upnpmgr.h
(2) Introduces abstraction for Authentication: p3authmgr.h
(3) New Connection Manager to coordinate networking code: p3connmgr.h
(4) New Configuration Manager: p3cfgmgr.h
This library has been significantly modified to support DHT synced connections
to enable connections between Firewalled Friends. The connection code has
been rewritten within a new framework, which should make extensions easier to code.
Also removed significant amount of old code relating to Tunnels, Channels etc.
This will be recycled later as higher level services that should not be
part of the core networking library.
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@306 b45a01b8-16f6-495d-af2f-9b41ad6348cc
