loongson/pypi: links for proxy-negotiate

loongson/mirror Proxy-Negotiate-1.0.0.tar.gz
loongson/mirror Proxy-Negotiate-0.2.2.tar.gz
loongson/mirror Proxy-Negotiate-0.2.1.tar.gz
loongson/mirror Proxy-Negotiate-0.2.tar.gz
loongson/mirror Proxy-Negotiate-0.1.0.tar.gz
loongson/mirror Proxy-Negotiate-0.1.0.linux-x86_64.tar.gz