X11: double-click word delimiters

[Lukas Ruf <ruf@tik.ee.ethz.ch>]

Dear all,

where and how can I configure the delimiters of what gets selected under
X11v4 (fvwm) when I double-click on words?

An example:
http://www.nodeos.org -- double click on nodeos selects just nodeos but I
would like that all enclosed by whitespace is selected.

Thanks for any help!

Lukas
-- 
Lukas Ruf                        Swiss Federal Institute of Technology
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