update all vendored dependencies

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

@@ -14,6 +14,11 @@
 
 package redis
 
+import (
+	"errors"
+	"time"
+)
+
 // Error represents an error returned in a command reply.
 type Error string
 
@@ -40,20 +45,73 @@ type Conn interface {
 	Receive() (reply interface{}, err error)
 }
 
-// Argument is implemented by types which want to control how their value is
-// interpreted when used as an argument to a redis command.
+// Argument is the interface implemented by an object which wants to control how
+// the object is converted to Redis bulk strings.
 type Argument interface {
-	// RedisArg returns the interface that represents the value to be used
-	// in redis commands.
+	// RedisArg returns a value to be encoded as a bulk string per the
+	// conversions listed in the section 'Executing Commands'.
+	// Implementations should typically return a []byte or string.
 	RedisArg() interface{}
 }
 
-// Scanner is implemented by types which want to control how their value is
-// interpreted when read from redis.
+// Scanner is implemented by an object which wants to control its value is
+// interpreted when read from Redis.
 type Scanner interface {
-	// RedisScan assigns a value from a redis value.
+	// RedisScan assigns a value from a Redis value. The argument src is one of
+	// the reply types listed in the section `Executing Commands`.
 	//
 	// An error should be returned if the value cannot be stored without
 	// loss of information.
 	RedisScan(src interface{}) error
 }
+
+// ConnWithTimeout is an optional interface that allows the caller to override
+// a connection's default read timeout. This interface is useful for executing
+// the BLPOP, BRPOP, BRPOPLPUSH, XREAD and other commands that block at the
+// server.
+//
+// A connection's default read timeout is set with the DialReadTimeout dial
+// option. Applications should rely on the default timeout for commands that do
+// not block at the server.
+//
+// All of the Conn implementations in this package satisfy the ConnWithTimeout
+// interface.
+//
+// Use the DoWithTimeout and ReceiveWithTimeout helper functions to simplify
+// use of this interface.
+type ConnWithTimeout interface {
+	Conn
+
+	// Do sends a command to the server and returns the received reply.
+	// The timeout overrides the read timeout set when dialing the
+	// connection.
+	DoWithTimeout(timeout time.Duration, commandName string, args ...interface{}) (reply interface{}, err error)
+
+	// Receive receives a single reply from the Redis server. The timeout
+	// overrides the read timeout set when dialing the connection.
+	ReceiveWithTimeout(timeout time.Duration) (reply interface{}, err error)
+}
+
+var errTimeoutNotSupported = errors.New("redis: connection does not support ConnWithTimeout")
+
+// DoWithTimeout executes a Redis command with the specified read timeout. If
+// the connection does not satisfy the ConnWithTimeout interface, then an error
+// is returned.
+func DoWithTimeout(c Conn, timeout time.Duration, cmd string, args ...interface{}) (interface{}, error) {
+	cwt, ok := c.(ConnWithTimeout)
+	if !ok {
+		return nil, errTimeoutNotSupported
+	}
+	return cwt.DoWithTimeout(timeout, cmd, args...)
+}
+
+// ReceiveWithTimeout receives a reply with the specified read timeout. If the
+// connection does not satisfy the ConnWithTimeout interface, then an error is
+// returned.
+func ReceiveWithTimeout(c Conn, timeout time.Duration) (interface{}, error) {
+	cwt, ok := c.(ConnWithTimeout)
+	if !ok {
+		return nil, errTimeoutNotSupported
+	}
+	return cwt.ReceiveWithTimeout(timeout)
+}