qbittorrent/qBittorrent — pull request #606 by sledgehammer999 (2013-04-22 17:51:59+00:00)
Title: Show utorrent compatible peer flags. Implements issue #531.

This was also requested somewhere in the forums. I cannot find the thread though.
Relevant link to μtorrent FAQ: http://www.utorrent.com/help/faq/misc#faq13
I would suggest to explain the flags in the tooltips, but many of them are quite long to explain in the UI.