net/https (for debian, this will also need libopenssl-ruby)
socket
uri
+
+Useful but fallback provided
ruby-gettext 1.8.0+ http://www.yotabanana.com/hiki/ruby-gettext.html?ruby-gettext
optional, if installed rbot can use localized messages
+ htmlentities http://htmlentities.rubyforge.org/
+ optional, if missing rbot will use an internal table to decode
+ the most common HTML entities
Plugin requirements
(these are all optional, if you don't have them, the plugins just won't