building urls from server responses

[Gary F. <ga...@in...>]

Hello Robert,

Here are the additions to curl-loader that I've been working on. The  
new tags are documented in an attached file. They allow clients to  
fetch urls built from prior server responses, or from a token file.

There are also a few bug fixes (at least I think they were bugs):  
multiple clients can now upload the same file repeatedly without  
interference, form_strings can now have many %s markers, and  
whitespace is removed from form_string tokens. (The code always  
removed whitespace, but a minor bug caused the original token to be  
used instead.)

I tried to keep all of my changes in one new source file, url_set.c,  
but I had to put hooks and small changes into 5 other files: url.h,  
client.h, parse_conf.c, loader.c, and loader_fsm.c. These are all  
included. I've marked all the changes with GF in a comment to make  
them easy to find.

I've tested all this to my own satisfaction, but of course there will  
be bugs that I haven't uncovered yet.

If you want to adopt any of these changes, it might make sense to move  
the url_set.c code back into parse_conf.c and loader.c -- whatever is  
most convenient.

Gary Fitts