I recently installed rxvt-unicode using MacPorts on OSX. However, when I was
doing some terminal related tasks such as using screen I was getting errors
such as "Missing termcap entry for rxvt-unicode". After digging through the
rxvt-unicode documentation, the following bash command install the appropriate
termcap entry.
$ infocmp rxvt-unicode > /tmp/termcap
$ tic /tmp/termcap