update vendor directory

vendor/github.com/garyburd/redigo/.travis.yml

@@ -8,6 +8,7 @@ go:
   - 1.5
   - 1.6
   - 1.7
+  - 1.8
   - tip
 
 script:

vendor/github.com/garyburd/redigo/redis/conn.go

@@ -128,7 +128,7 @@ func DialPassword(password string) DialOption {
 }
 
 // DialTLSConfig specifies the config to use when a TLS connection is dialed.
-//  Has no effect when not dialing a TLS connection.
+// Has no effect when not dialing a TLS connection.
 func DialTLSConfig(c *tls.Config) DialOption {
 	return DialOption{func(do *dialOptions) {
 		do.tlsConfig = c