[tclwebtest] Correct eval call from do_request

[Grzegorz A. H. <gr...@ef...>]

My previous post advanced a problem with -noredirect, introduced
before. This parameter makes do_request return the targeted url
without following it. The problem was that it wasn't being set
correctly when the redirection was followed. Hence, with this script:

   log "We ended up at: [do_request http://www.efaber.com/]"

...the output is:

   --- do_request for http://www.efaber.com/
   http status: >>302<<
   following a redirect to: http://www.efaber.net
   
   --- do_request for http://www.efaber.net
   http status: >>200<<
   We ended up at: http://www.efaber.com/

So, the attached patch fixes this, and the result is now:

   --- do_request for http://www.efaber.com/
   http status: >>302<<
   following a redirect to: http://www.efaber.net
   
   --- do_request for http://www.efaber.net
   http status: >>200<<
   We ended up at: http://www.efaber.net

The peculiar reason for computing the commands for eval as a list
are explained in a book about tcl I have right here, which says
that using double quotes is bad because structure is lost. More
importantly, my previous grief with a void redirection is now
worse: since the empty url is processed correctly, the procedure
absolute_link returns the same url, and hence tclwebtest runs into
an infinite loop.

This should point out that either "" as relative url is invalid,
or there's a problem with tclwebtest for not being able to parse
a chain of redirections ending on a void one (maybe my suggestion
for a history variable is right after all?).

-- 
 Grzegorz Adam Hankiewicz, gr...@ef.... Tel: +34-94-472 35 89.
 eFaber SL, Maria Diaz de Haro, 68, 2         http://www.efaber.net/
 48920 Portugalete, Bizkaia (SPAIN)