tvhpoll: added support (epoll) for auto-modifying poll entries
webui: minor re-ordering of status tabs
http: added new HTTP client code to use CURL

this is being used within IPTV code, and eventually I might make this a bit
more generic so I can use from elsewhere, like imagecache.
util iptv: some url processing utilities
util iptv: add support for using liburiparser

This is more flexible (it supports IPv6) and almost certainly more robust!
iptv: re-structure IPTV code, including adding back in IPv6 support

Backends for handling various protocols are now modular. It's not
well tested and I think the APIs could probably be improved/simplified.
support iptv: updated the configure script and Makefile for iptv code
iptv: ensure that IPTV network settings are saved
linuxdvb: move scanfile lines from debug to trace
webui streaming: make weight param universal for all HTTP streaming
mpegts: add helper function for determining the weight of a mux instance
iptv: added new configuration to allow subs and bandwidth limitations

The bandwidth limit is a soft one, it will stop any new subscriptions if
the peak bandwidth on the current services exceeds the limit. Possibly
this will need a bit of additional averaging in future to stop false
triggers.