Handle timeout exception in roundup-server better. A timeout in roundup-server used to generate another exception: OSError: cannot read from timed out object when it tried to reuse the socket that timed out. Now return status 408, a brief message and trigger closing of the socket. Manual testing, no CI. To test used curl -X POST with no --data defined.

Babel
Jinja2
MarkupSafe
Pygments
alabaster
certifi
charset-normalizer
docutils
idna
imagesize
packaging
pyparsing
requests
six
snowballstemmer
sphinxcontrib-applehelp
sphinxcontrib-devhelp
sphinxcontrib-htmlhelp
sphinxcontrib-jsmath
sphinxcontrib-qthelp
sphinxcontrib-serializinghtml
sphinxcontrib-websupport
urllib3