Updating External dependencies to rc4-24209-00

Commit migrated from https://github.com/dotnet/corefx/commit/a91b50e173257697f30dd4a504999e401218c0a4

Update netcore50 MaxResponseHeadersLength property

Commit migrated from https://github.com/dotnet/corefx/commit/a6fc5237f0db5dc7aecf128bbb5dd7bbe570d495

Commit migrated from https://github.com/dotnet/corefx/commit/e63f2c09a4ec1ab5bc21edb17b519889035b3715

Updating CoreFx dependencies to rc4-24209-03

Commit migrated from https://github.com/dotnet/corefx/commit/afd774a4e25b8725c004bbbf7f73c9cf9d5a0ea9

Fix OpenSslCipher.OpenKey check for valid SafeHandle

Commit migrated from https://github.com/dotnet/corefx/commit/a8eb6cef2806b698bf098fa01ffaa3924f77c7de

Remove two asserts from SystemNative_ForkAndExecProcess

Commit migrated from https://github.com/dotnet/corefx/commit/8bba0082d7d50793f69ad686d763dc9c4f19536d

Commit migrated from https://github.com/dotnet/corefx/commit/4786e13a70b20350f77d047624384090341acfa1

Ignore standard error when querying openssl

Commit migrated from https://github.com/dotnet/corefx/commit/2cd0c1f8f9f229f3cb5e8e9bcd018559df9efea6

Add supports clauses for new/old platforms

Commit migrated from https://github.com/dotnet/corefx/commit/71a8f8228d62ebedc178800003e0ff3d82066a9d

On some platforms, we get error text from openssl when we query for null
ciphers. The error message is written to standard error and printed in a
way such that MSBuild thinks xUnit has encounted an error and fails the
entire test suite.

To work around this issue, we'll just ignore standard error when we do
this query.

Fixes dotnet/corefx#9272


Commit migrated from https://github.com/dotnet/corefx/commit/e37db195eaa2289b186fcf780cb239d17672c1e6

Removes size validation in TryGetDirectoryOffset, adds tests

Commit migrated from https://github.com/dotnet/corefx/commit/b9e5f72cc3c0ec303ea9e1f625e1bacff24c10ca

If the CryptoNative_EvpCipherCreate function returns nullptr, the managed EvpCipherCreate will return a SafeEvpCipherCtxHandle instance that wraps the nullptr, so the result will be an IsInvalid==true instance, not null.  The CheckValidOpenSslHandle helper checks for both cases.


Commit migrated from https://github.com/dotnet/corefx/commit/c0e2848a36039ad0a9b092e4511551cd17b8bf27

Commit migrated from https://github.com/dotnet/corefx/commit/f4a777e7163757e5952462ad6e4026ec05e16e7f

This enables folks to use the "supports" feature with new and old
platforms.  All of these platforms support contracts and some version
of NETStandard so we should enable folks to build package-based PCLs
against them as well as opt-in to gaurdrails if they'd like that
protection.


Commit migrated from https://github.com/dotnet/corefx/commit/66071ea1e30805f0268a92a07a55c811e5908d44

Update PlatformNotSupportedException message for Socket.Connect on Unix

Commit migrated from https://github.com/dotnet/corefx/commit/806de2df949cea0ed7ddc63633396c694d29c66b

Fixes a doc comment bug in Expression.VisitChildren.

Commit migrated from https://github.com/dotnet/corefx/commit/6339c40d6971c9502c8b168ba20dab6052f1d9c7

Commit migrated from https://github.com/dotnet/corefx/commit/f8870a7b2ae22486a4461bc3859690a4e8540dae

Updating CoreFx dependencies to rc4-24208-04

Commit migrated from https://github.com/dotnet/corefx/commit/d2cbe4030a445ca54ad4d200b8daad2cb473f7a7

Commit migrated from https://github.com/dotnet/corefx/commit/ffe1b9d0cd94cb6c431b700c42b270037f6a1f79

Windows.Web.Http is built on WinINet. There is no maximum limit (except
for out of memory) for received response headers. So, returning 0
(indicating no limit) is appropriate.

Fixes dotnet/corefx#8541.


Commit migrated from https://github.com/dotnet/corefx/commit/9883a1064c1119eaa885e5b4cff20177f0f928fe

Commit migrated from https://github.com/dotnet/corefx/commit/02515a1ace7d60e2b8b63c4b80427b0a1275503c

Remove keepallprojectreferences from system.net.http and system.net.security tests

Commit migrated from https://github.com/dotnet/corefx/commit/fc88bf49cf8cdaa6c5484b3e19f8f17cccd50fbb

Add clang3.8 to build.sh option

Commit migrated from https://github.com/dotnet/corefx/commit/37ab22bcff7558c02f703607a5259dcc2a2e6b43

Coded index cleanup

Commit migrated from https://github.com/dotnet/corefx/commit/acb4cbe7e0f40201349ab498a3fa0daad86e5cbb

Commit migrated from https://github.com/dotnet/corefx/commit/953a407d94073b4d8c2057e1d60ab257c6858a62

Commit migrated from https://github.com/dotnet/corefx/commit/bc3775f1dccc80a11605b794296aa54037420713

Fixing Socket async connect for connection-less protocols; Fixing and enabling Socket perf tests.

Commit migrated from https://github.com/dotnet/corefx/commit/0be80a870383664997f065a6d8a911b12a2d56c3

Always use Release version of TestNativeService.

Commit migrated from https://github.com/dotnet/corefx/commit/83d245faab882d635154b621c3d78f9ff15d8438

[master] Update buildtools to add Serviceable to nupkgs

Commit migrated from https://github.com/dotnet/corefx/commit/ebb6e2b3fa837a1a2f3b3e723823c78e02479f75

Fix dependency conflict warnings

Commit migrated from https://github.com/dotnet/corefx/commit/9fb78b52a0f04e56fd69f57209107163410a6b07

Commit migrated from https://github.com/dotnet/corefx/commit/0eab3ef1c852798ba4877251d432c4abfcbc27d8

Updating CoreClr dependencies to rc4-24207-04

Commit migrated from https://github.com/dotnet/corefx/commit/7ad2777f88928891c3a00111a15fb1f4304827ab

Commit migrated from https://github.com/dotnet/corefx/commit/b9d29051042f7fe910fda80c059c64312623c301

Commit migrated from https://github.com/dotnet/corefx/commit/42b6e3833fdc789756e4fd931111d1771b03f0b5

These can happen in low-memory conditions, and we don't want to assert in such cases.


Commit migrated from https://github.com/dotnet/corefx/commit/e635352433a8e32bef2a5710400b48380016e849

Commit migrated from https://github.com/dotnet/corefx/commit/4070ceb3d89c2d9a0adf51c29cf8f20fc53e5fc5

Allow whitespace after HTTP response header name

Commit migrated from https://github.com/dotnet/corefx/commit/ca0075eda676f9a35f43a0c6994fc08c0b1981b3

Commit migrated from https://github.com/dotnet/corefx/commit/25d4dbf46ed63abd4ff96a8f855f21c4420ae597

The upgrade to netstandard1.6 seems to have caused some newer libraries to be preferred.


Commit migrated from https://github.com/dotnet/corefx/commit/4b2af116dd90c5b6a3faca4e87b2e86582e5089d

Fix Filesystem tests failing from path changes

Commit migrated from https://github.com/dotnet/corefx/commit/e0ca47e853ddabb3e4d4331f266acd2aa6e7e687