I'm working behind a huge firewall, probably the lagest in the world 
So suddenly my subversion repo on unfuddle isn't working, I have to use subversion through a http proxy, here's how I did it.
open ~/.subversion/servers, find the [global] section in the end, and add the proxy connfiguration:
Windows:
C:\Documents and Settings\user\Application Data\Subversion\auth\svn.simple\
C:\Users\user\AppData\Roaming\Subversion\auth\svn.simple\
Linux:
~/.subversion/auth/svn.simple
Delete the file will clean the saved credentials. Then you can login with another account.
1. find out the current repository url:
$ svn info Path: . URL: https://ipaddress/svn/project Repository Root: https://ipaddress/svn/project
2. use svn switch to change the URL
$svn switch --relocate https://ipaddress/svn/project http://ipaddress/svn/project
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