[SSK] Better logging for envelopes

Leave last 3 digits of recipientId when scrubbing logs.

This is in line with other Signal clients, and makes it possible to
trace interactions.

// FREEBIE

Podfile.lock

@@ -133,7 +133,7 @@ CHECKOUT OPTIONS:
     :commit: 23a5d1b67afc4dd028198202e25fd2e06ce396d7
     :git: https://github.com/WhisperSystems/SignalProtocolKit.git
   SignalServiceKit:
-    :commit: 1fd7627daf713521e5ea8f20e266873d41e8c488
+    :commit: 63cc0328b5523b53216285e0c754d0500b3ec344
     :git: https://github.com/WhisperSystems/SignalServiceKit.git
   SocketRocket:
     :commit: 877ac7438be3ad0b45ef5ca3969574e4b97112bf

Signal/src/util/OWSScrubbingLogFormatter.m

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 9/27/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "OWSScrubbingLogFormatter.h"
 
@@ -17,7 +18,7 @@ NS_ASSUME_NONNULL_BEGIN
     NSString *filteredString = [phoneRegex stringByReplacingMatchesInString:string
                                                                     options:0
                                                                       range:NSMakeRange(0, [string length])
-                                                               withTemplate:@"[ REDACTED_PHONE_NUMBER ]"];
+                                                               withTemplate:@"[ REDACTED_PHONE_NUMBER:xxx$1 ]"];
 
     return filteredString;
 }

Signal/test/util/OWSScrubbingLogFormatterTest.m

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 9/27/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "OWSScrubbingLogFormatter.h"
 #import <XCTest/XCTest.h>
@@ -36,11 +37,9 @@ NS_ASSUME_NONNULL_BEGIN
 
     for (NSString *phoneString in phoneStrings) {
         OWSScrubbingLogFormatter *formatter = [OWSScrubbingLogFormatter new];
-        NSString *actual = [formatter
-            formatLogMessage:[self
-                                 messageWithString:[NSString stringWithFormat:@"My phone number is %@", phoneString]]];
-
-        NSRange redactedRange = [actual rangeOfString:@"My phone number is [ REDACTED_PHONE_NUMBER ]"];
+        NSString *messageText = [NSString stringWithFormat:@"My phone number is %@", phoneString];
+        NSString *actual = [formatter formatLogMessage:[self messageWithString:messageText]];
+        NSRange redactedRange = [actual rangeOfString:@"My phone number is [ REDACTED_PHONE_NUMBER:xxx234 ]"];
         XCTAssertNotEqual(NSNotFound, redactedRange.location, "Failed to redact phone string: %@", phoneString);
 
         NSRange phoneNumberRange = [actual rangeOfString:phoneString];