Xterm title format string

[Adam Byrtek / alpha <alpha student uci agh edu pl>]

Hi, I'm implementing the feature (from TODO list) which allows to set
the xterm window title using the user-specified format string like:

   "%f - mc"

which will be replaced (for example) with:

   "/home/alpha/cvs - mc"

I just like to ask you, what other format variables might be useful
for users (pid, edited/viewed file name...)? I will appreciate any
suggestions.

Regards

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