* fixed uTP vulnerability
* make utf8 conversions more lenient
* fix loading of piece priorities from resume data
* improved seed-mode handling (seed-mode will now automatically be left when
performing operations implying it's not a seed)
* fixed issue with file priorities and override resume data
* fix request queue size performance issue
* slightly improve UDP tracker performance
* fix http scrapes
* add missing port mapping functions to python binding
* fix bound-checking issue in bdecoder
* expose missing dht_settings fields to python
* add function to query the DHT settings
* fix bug in 'dont_count_slow_torrents' feature, which would start too many
torrents