Update deps to pull in additional logging changes.

This update adds additional callsite logging options via btclog and
fixes an error with the rotator package that caused it to stop running
when creating any log messages larger than 4096 bytes.

While here, switch to the new Write method of the Rotator object as
this is more efficient than using the Reader interface with a pipe.

Changes from @jrick.

glide.lock

@@ -1,8 +1,8 @@
 hash: 976decfaf173d97d2e4572399490637aa12e217312a7d8b28813780a738e1151
-updated: 2017-08-15T20:07:19.2012575-05:00
+updated: 2017-08-24T17:28:45.8117156-05:00
 imports:
 - name: github.com/btcsuite/btclog
-  version: 96c2a91a67da03552a5e6554fe3ccbfbc7f860be
+  version: 84c8d2346e9fc8c7b947e243b9c24e6df9fd206a
 - name: github.com/btcsuite/btcutil
   version: 501929d3d046174c3d39f0ea54ece471aa17238c
   subpackages:
@@ -47,7 +47,7 @@ imports:
 - name: github.com/jessevdk/go-flags
   version: 1679536dcc895411a9f5848d9a0250be7856448c
 - name: github.com/jrick/logrotate
-  version: 4ed05ed86ef17d10ff99cce77481e0fcf6f2c7b0
+  version: a93b200c26cbae3bb09dd0dc2c7c7fe1468a034a
   subpackages:
   - rotator
 - name: golang.org/x/crypto

log.go

@@ -7,7 +7,6 @@ package main
 
 import (
 	"fmt"
-	"io"
 	"os"
 	"path/filepath"
 
@@ -31,7 +30,7 @@ type logWriter struct{}
 
 func (logWriter) Write(p []byte) (n int, err error) {
 	os.Stdout.Write(p)
-	logRotatorPipe.Write(p)
+	logRotator.Write(p)
 	return len(p), nil
 }
 
@@ -53,10 +52,6 @@ var (
 	// application shutdown.
 	logRotator *rotator.Rotator
 
-	// logRotatorPipe is the write-end pipe for writing to the log rotator.  It
-	// is written to by the Write method of the logWriter type.
-	logRotatorPipe *io.PipeWriter
-
 	adxrLog = backendLog.Logger("ADXR")
 	amgrLog = backendLog.Logger("AMGR")
 	cmgrLog = backendLog.Logger("CMGR")
@@ -117,17 +112,13 @@ func initLogRotator(logFile string) {
 		fmt.Fprintf(os.Stderr, "failed to create log directory: %v\n", err)
 		os.Exit(1)
 	}
-	pr, pw := io.Pipe()
-	r, err := rotator.New(pr, logFile, 10*1024, false, 3)
+	r, err := rotator.New(logFile, 10*1024, false, 3)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "failed to create file rotator: %v\n", err)
 		os.Exit(1)
 	}
 
-	go r.Run()
-
 	logRotator = r
-	logRotatorPipe = pw
 }
 
 // setLogLevel sets the logging level for provided subsystem.  Invalid