- Update to version 1.27.0
  * Expose GNU TLS wrappers and add methods to get certificate
    expiry.
  * Improve thread safety when using zombies, particularly on
    statup/shutdown.
  * Improvements for Ukrainian localization.
  * Decreased ICU requirements to 49 to support Windows 2000.
  * Simplifications and fixes in GSPrivateSymbolPath().
  * GSMime improvements (word encoding specifier, utf-8
    improvements encoding quoted words with multibyte characters)
  * NSJSONSerialization fixes for codepoints over 0x7f.
  * NSCharacterSet support for URL*AllowedCharacterSet and
    declarations for new character sets.
  * NSString implementations for new methods
    stringByRemovingPercentEncoding/
    stringByAddingPercentEncodingWithAllowedCharacterSet:.
  * Fixed a crash in gdomap when an invalid hostname is given
    for the -M option.
  * In NSString.m, removed functions urldecode() and ishex()
    which were mistakenly neither namespaced nor declared static
    and thus could have conflicted with non-library code.
  * Fixed libdispatch configuration switch so
    -enable-libdispatch works correctly; correctly checking for
    HAVE_LIBDISPATCH_RUNLOOP.
  * Updated libdispatch runloop integration so it is compatible
    with Swift's corelibs libdispatch release (from
    github.com/apple/swift-corelibs-libdispatch).  The
    libdispatch must be compiled with
    INSTALL_PRIVATE_HEADERS=YES.
  * In NSThread, spinlocks implemented using builtins to be able
    to target platforms without pthread_spin_lock(), such as
    Android targeting API level < 24.
  * In NSLog on Android, send logs to syslog.
  * Implementation of NSOrderedSet.
  * When ./configuring, link against libandroid on Android.
  * In NSBundle, allow integrating with Android asset manager
    using +[NSBundle setJavaAssetManager:withJNIEnv:], enabling
    use of mainBundle's pathForResource:ofType:,
    -URLForResource:ofType: and similar; referencing Info.plist
    if it exists in Android assets; use of NSFileManager's
    fileExistsAtPath: et al and isReadableFileAtPath:; reading
    files using NSFileHandle APIs; use of NSDirectoryEnumerator
    to enumerate Android assets from the main bundle.
  * In NSBundle, localization support on Android.
  * In NSProcessInfo, automatic initialization on Android using
    a fake executable path
    (/data/data/<app identifier>/Resources).
  * In NSData, improvements in reading Android assets.
  * Various improvements in the mechanism to report memory usage
    of individual objects.
  * Skeletal implementation of NSUbiquitousKeyValueStore.
  * Implementation of NSByteCountFormatter.
  * Fixes to writing large HTTPS requests (GSSocketStream,
    NSURLProtocol).
  * In gdomap.c, fix detection of local networks.
  * In NSArray's -removeObjectsInArray:, prevent some crashes.
  * In GSTLS, avoid setting session priority twice.
  * In NSFileHandle, fix so that setting certificate information
    does not discard any other options already set.
  * In GSXML's -fatalErrorFunction, use the correct function to
    get the line number.
  * In NSOperation's _execute, ensure lock gets released on an
    error by surrounding with NS_DURING.
  * Generics support in NSHashTable.
  * Implementation of NSProgress.
  * Skeleton implementation of NSURLComponents.
  * In NSSortDescriptor, added
    -sortDescriptorWithKey:ascending:descending:.
  * In NSOperationQueue, added -addOperationWithBlock.
  * In NSFileManager, added
    -URLForDirectory:inDomain:appropriateForURL:create:error: and
    -enumeratorAtURL:includingPropertiesForKeys:options:errorHandler:.
    Also added NSItemReplacementDirectory constant, and updated
    stub implementation for -URLForDirectory:shouldCreate:error:. 
    Added -initWithDirectoryPath:...  with additional parameters
    skipHidden and errorHandler.
  * In NSDictionary, fixed keysSortedByValueUsingComparator:.
  * Moved NSFileWrapper from -gui to -base.
  * Added NSFilePresenter, NSFileVersion and NSFileCoordinator.
  * Added NSPersonComponents and NSPersonNameComponentsFormatter.
  * Added units of measurement classes such as NSUnit,
    NSMeasurement, NSMeasurementFormatter, NSEnergyFormatter,
    NSLengthFormatter, NSMassFormatter.
  * In NSUnit, support for NSUnitArea, NSUnitConcentrationMass,
    NSUnitDispersion, NSUnitElectricCharge, NSUnitIlluminance,
    NSUnitElectricCurrent, NSUnitElectricPotentionDifference,
    NSElectricResistance, NSUnitMass, NSUnitEnergy,
    NSUnitFrequency, NSUnitPower, NSUnitSpeed,
    NSUnitFuelEfficiency, NSUnitPressure, NSUnitVolume,
    NSUnitLength.
  * Support for data directory on Android introduces
    GSInitializeProcessAndroid and makes use of the path
    returned by Context.getFilesDir() as the basis for storing
    data (e.g. NSUserDefaults) and when querying for directory
    paths (NSLibraryDirectory, NSApplicationSupportDirectory,
    etc.).
  * Placeholder NSScript* classes.  Added NSUserActivity,
    NSObjectScripting, NSHFSFileTypes, NSAppleEventManager and
    NSAppleEventDescriptor.
  * Added NSDateInterval intersectionWithDateInterval:.
  * Added NSBackgroundActivityScheduler.
  * Added NSISO8601DateFormatter and NSMetadataAttributes.
  * Added NSOrtogrpahy and NSLinguisticTagger.
  * Added NSExtensionItem, NSExtensionContext,
    NSExtensionRequestHandling, and NSItemProvider and
    NSItemProviderReadingWriting.
  * Updated timezone info for NSTimeZones.
  * On Android, support for NSTemporaryDirectory to use
    Context.getCacheDir(), and cleaning it up in
    GSInitializeProcessAndroid() given there is no support for
    temp directory before Android API 26.  Also used with
    NSCachesDirectory + NSUserDomainMask.
  * NSXPCConnection fixes.
  * NSException symbolication support using libunwind (used when
    backtrace() is unavailable).
  * Travis build improvements to use new runloop integration and
    gnustep-2.0 runtime.
  * In NSKeyValueObserving, implement two missing methods for
    NSArray: -addObserver:options:context: and
    -removeObserver:fromObjectsAtIndexes:forKeyPath:.
  * Updated NSUUID to use instancetype.
  * Added support for NSDate constants in NSPredicate.
  * Fixed a NSTimer bug with blocks.
  * In GSTLS, do not put password in the hash key of the
    credentials, and to avoid logging it when debugging is on.
  * Improvements in NSConcreteHashTable and NSConcreteMapTable.
  * In various places, switch away from deprecated
    CREATE_AUTORELEASE_POOL() to use the ARC-compatible
    ENTER_POOL and LEAVE_POOL macros.
  * When building the list of hosts to be probed to see if they
    have gdomap servers, fix code to include those explicitly
    defined in the config file.  Add -S option to list the
    addresses of the known gdomap servers.
  * Backward compatibility fix for ICU 65.
  * Update GSPrivateSymbolPath() so that, on the path where
    LINKER_GETSYMBOL is not available, we attempt to lookup
    classes using the prefix ._OBJC_CLASS_ for the 2.0 ABI
    (earlier ABIs use a prefix of __objc_class_name_ for the
    class definition.
  * Fix parsing of NSURLResponse content type header.
  * Fix for class lookup when using the 2.0 ABI.
  * Fixed NSURLComponents setURL: throwing exceptions when URL
    didn't have all expected parts caused by rangeOfString:
    throwing for nil values.
  * Added NSURLQueryItem implementation.
- Spec cleanup

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