Detail:
C:\>go get -u github.com/hidu/proxy-manager
package code.google.com/p/go.net/proxy: Get http://www.google.com/hangouts/: stopped after 10 redirects
package golang.org/x/crypto/blowfish: unrecognized import path "golang.org/x/crypto/blowfish"
package golang.org/x/crypto/cast5: unrecognized import path "golang.org/x/crypto/cast5"
package golang.org/x/crypto/salsa20/salsa: unrecognized import path "golang.org/x/crypto/salsa20/salsa"
I think maybe it because google is forbidden in china? How to solve this error?