fails:Net::HTTP.proxy_pass when self is no proxy class returns nil
fails:Net::HTTP.proxy_pass when self is a proxy class returns nil if no password was set for self's proxy connection
fails:Net::HTTP.proxy_pass when self is a proxy class returns the password for self's proxy connection
fails:Net::HTTP#proxy_pass when self is no proxy class instance returns nil
fails:Net::HTTP#proxy_pass when self is a proxy class instance returns nil if no password was set for self's proxy connection
fails:Net::HTTP#proxy_pass when self is a proxy class instance returns the password for self's proxy connection
