Expose separate function to determine if thread is attached. Revert unity specific change to prevent mono_thread_current from auto attaching.

Fixes for OS X El Capitan

Get universal binary changes from the buildscripts repo.

# By Tak
# Via Tak
* unity-future-phase1:
  TimeZoneInfo: Fall back to UTC.

Conflicts:
	.gitmodules
	configure.ac
	eglib/Makefile.am
	eglib/configure.ac
	eglib/src/goutput.c
	mcs/class/Makefile
	mcs/class/System.Core/Makefile
	mcs/class/System/Documentation/en/System.Net/ServicePointManager.xml
	mcs/class/System/Makefile
	mcs/class/corlib/Documentation/en/System.Globalization/CultureInfo.xml
	mcs/class/monodoc/Resources/base.css
	mcs/class/monodoc/monodoc-net_4_5.csproj
	mcs/jay/jay.vcxproj
	mono/io-layer/handles.c
	mono/io-layer/processes.c
	mono/metadata/appdomain.c
	mono/metadata/class.c
	mono/metadata/coree.c
	mono/metadata/coree.h
	mono/metadata/domain.c
	mono/metadata/gc.c
	mono/metadata/icall.c
	mono/metadata/loader.c
	mono/metadata/metadata.c
	mono/metadata/reflection.c
	mono/metadata/sgen-gc.c
	mono/metadata/threads.c
	mono/mini/debugger-agent.c
	mono/mini/exceptions-amd64.c
	mono/mini/exceptions-x86.c
	mono/mini/method-to-ir.c
	mono/mini/mini-amd64.c
	mono/mini/mini-arm.c
	mono/mini/mini-exceptions.c
	mono/utils/mono-dl.c
	mono/utils/mono-mmap.c
	mono/utils/mono-threads-mach-helper.c
	msvc/eglib.vcxproj
	msvc/genmdesc.vcxproj
	msvc/libgc.vcxproj
	msvc/libmono.vcxproj
	msvc/libmonoruntime.vcxproj
	msvc/libmonoutils.vcxproj
	msvc/libtest.vcxproj
	msvc/mono.vcxproj
	msvc/monodiet.vcxproj
	msvc/monodis.vcxproj
	msvc/monograph.vcxproj
	msvc/monoposixhelper.vcxproj
	msvc/pedump.vcxproj
	msvc/profiler-codeanalyst.vcxproj
	msvc/profiler-cov.vcxproj
	msvc/profiler-logging.vcxproj
	msvc/profiler-vtune.vcxproj
	msvc/test_eglib.vcxproj
	tools/locale-builder/Driver.cs

By locking `threads_lock` before launching the thread, we guarantee that the thread is not going to remove itself from `threads` before we actually add it to `threads`.

Process.GetProcesses () was not returning any processes.

    That was still useful in 2003/2004 but the technical and legal landscape
    changed a lot since then. Removing the old, limited key size, cipher
    suites also allow removed additional parts of the code that deals with
    them.

    There's almost no SSLv3 web site left so a v2 fallback is only extra
    code we do not need to carry forward.

When a socket has been closed as part of the negotiation, the
SendAlert method would crash when trying to reuse the socket.

Add try/catch around this to prevent this.

Fixes #19334

Failure caused by https://github.com/mono/mono/commit/2f1b464beb14a1b6b6099a03fc332493293bef35.

```
../../../../../mono/mono/utils/mono-proclib.c:104:8: error: use of undeclared identifier 'errno'
                        if (errno != ENOMEM)
                            ^
../../../../../mono/mono/utils/mono-proclib.c:104:17: error: use of undeclared identifier 'ENOMEM'
                        if (errno != ENOMEM)
```

[runtime] Avoid failures in Process.GetProcesses () when the number of processes is above 400. Fixes #26382.

Conflicts:
	mono/mini/method-to-ir.c

The existing code only prevented HTTP PUTs from not having MIME-type
boundaries.   Apply this also to FTP methods.

Bring a referencesource helper method that determines the default
method based on a Uri.

The existing test case only tested for the attempt to upload a file
not for the contents.   Extended the code to check for a bit more
(just that the uplaod is actually 10 bytes long).

Fixes #26312

Revert "Revert "[System.IO] Phase 2 of revamping KeventWatcher (FileSystemWatcher implementation for OS X/kqueue). Dozens of bugs and reliability issues fixed.""

This reverts commit d778fb36.

Revert "Revert "[System.IO] Reimplemented much of the kqueue-based file watcher so that watching subdirectories works.""

This reverts commit c82a2e50.

[runtime] Add another rule for the builder-sgen.h -> main-sgen.o dependency since apparently some versions of automake etc. generate a main-sgen.o file too.

This reverts commit a9f31e63.

Revert this as it breaks make dist by having a source file depend on a generated file.

Revert "[System.IO] Reimplemented much of the kqueue-based file watcher so that watching subdirectories works."

This reverts commit 13fd028e.

The new FSW is not making the 3.12 release.

Revert "[System.IO] Phase 2 of revamping KeventWatcher (FileSystemWatcher implementation for OS X/kqueue). Dozens of bugs and reliability issues fixed."

This reverts commit 717c6de1.

The new FSW is not making the 3.12 release.

[sdb] Fix more crashes on shutdown when the assembly unload callbacks are called on the debugger thread. Fixes #25009.

Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=24742
Context: Commit f7fd52ad
Context: https://bugzilla.xamarin.com/show_bug.cgi?id=24958

The logic of Commit f7fd52ad was 'Desktop Mono returns "Local" from
TimeZoneInfo.Local.Id, so surely Xamarin.Android should', predicated
in part on the assumption that whatever Desktop Mono does should be
the same as what Desktop .NET does.

This assumption wasn't verified, and is in fact wrong; Desktop .NET
doesn't return "Local" from TimeZoneInfo.Local.Id, it returns an
actual identifier.

The reason why Desktop Mono returns "Local" is due to implementation
sanity, particularly on OS X: /etc/localtime may be a symlink OR a
copy of the timezone data, and when it's a copy there's no way to
determine the Olson ID for the timezone. Consequently, it may not be
possible to determine the TimeZone ID.

Xamarin.Android doesn't have that problem; it uses the Android
persist.sys.timezone system property value,
falling back to java.util.TimeZone.getDefault().getID() if necessary,
and thus always has access to an Olson ID.

Change TimeZoneInfo.Local.Id on Xamarin.Android to return the Olson ID
instead of "Local", partially reverting Commit f7fd52ad.