SAT>IP: remove debug #ifdef
httpc: Change the http_client_thread locking
gui: show the TV adapters tab also for SAT>IP client
mpegts input: increase the buffering but add the time check for slow streams

It's better to handle packets in bigger chunks, but for slow streams,
add a quick timer check to deliver these data in time, too.
webui: campt is linuxdvb specific interface
dvr: Try to autodetect the UTF-8 filesystem charset
dvr: Fix the NULL dereference caused by the previous  ccommit
dvr: third default charset fix
osx: fix interface selection for ipv4 multicast joins
osx: fix install

Use POSIX compliant -R parameter instead of obsolete -r.
On linux they are equivalent, on OS X -r is not supported.
build: download dvbscan files even if linuxdvb is disabled