Please support serving pages on web path other than /

For example, I want to serve the entire site under /epicyon web path.

Currently, there are some places that hard-code an absolute web path:

$ grep -R "action=\"/"
webapp_timeline.py:            '<form id="modtimeline" method="POST" action="/users/' + \
webapp_welcome.py:        'action="/users/' + nickname + '/profiledata">\n'
webapp_login.py:    loginForm += '<form method="POST" action="/login">\n'
webapp_welcome_final.py:        'action="/users/' + nickname + '/profiledata">\n'
webapp_welcome_profile.py:        'action="/users/' + nickname + '/profiledata">\n'
webapp_question.py:            '<form method="POST" action="/users/' + \
webapp_column_right.py:        'accept-charset="UTF-8" action="/users/' + nickname + \

I would like to set a parameter like --base-url "/epicyon", and have that inserted as a prefix to all URLs.