tracd does not accept folded http header

I found that tracd does not work in some cases, specifically when the http header is folded because of its longness. To solve this problem, I modified /usr/lib/python2.4/site-packages/trac/web/wsgi.py as following.

1. Make unfold_header function.

   def unfold_header(self):
       lineno = 1
       while lineno < len(self.headers.headers):
           header = self.headers.headers[lineno]
           if header.startswith(' ') or header.startswith('\t'):
               self.headers.headers[lineno - 1] += header
               del(self.headers.headers[lineno])
           else:
               lineno = lineno + 1
   

2. Call this function from setup_environ function in WSGIRequestHandler class.

   length = self.headers.getheader('content-length')
   if length:
       environ['CONTENT_LENGTH'] = length
   
   # insert this line here.
   self.unfold_header()
   
   for name, value in [header.split(':', 1) for header
                       in self.headers.headers]:
   

This was my first time to program in Python, so there might be some problems. But this modified tracd is working for now.