Fix the date time set in file by removing the ':'.

This is the same code than the one under SendCore. The date time should
not have the : (time zone offset) to be able to use the file.
[Mono.Parallel] Removed broken Mono.Threading.Tasks code

The code in MonoTaskExtensions.cs relied on the internal method Execute(Action<Task>) in System.Threading.Tasks.Task which was removed in 0a66e60.
Added stress test to ConcurrentQueue.TryPeek.
The test checks that in some race condition the queue does not return null.
Changed TryPeek to handle race condition with Dequeue.
Dequeue sets the head.Value to its default. When TryPeek is interrupted in the process of retrieving the value some times Dequeue sets the value to its default. TryPeek now checks the head has not been changed before returning the value.
Added fix for Bug 11630
Support both unencrypted PKCS#12 and PKCS#12 encrypted with an empty password in X509Certificate2 constructor
[mcs] Reachability analysis should ignore local variables declarations. Fixes #20603
[system.data] Parse numeric expressions using invariant culture. Fixes #20582
Merge pull request #1099 from jsportaro/master

Added fix for Bug 11630
[mcs] Run new initializer await checks only in async context. Fixes #20614
Merge pull request #1101 from jariq/master

Support both unencrypted PKCS#12 and PKCS#12 encrypted with an empty pas...
Remove a reference to the file AvoidCDataTextReaderTests.cs so that tarballs can be built again.
The file was removed in https://github.com/mono/mono/commit/d8d1b0be6baf6f8881871592b040d85be790926c
Merge pull request #1102 from tpokorra/TarballFixAvoidCDataTextReaderTests

Remove a reference to the file AvoidCDataTextReaderTests.cs so that tarballs can be built again
Fix AddCacheDependency signature to use params

The .NET AddCacheDependency method signature is `public void AddCacheDependency(params CacheDependency[] dependencies);` Mono should mirror the signature (even if it isn't implemented) to prevent build errors. Conditional code, of course, will need to be used for an alternative mono path.
[bcl] Fix the mobile build.
Tarball: include System.Security.dll and System.Configuration.dll in monolite directory
this is related to commit https://github.com/mono/mono/commit/993f4773638bcb36abf8b9660ee737d6445c5200
Merge pull request #1104 from tpokorra/TarballIncludeMoreDllsInMonoLite

Tarball: include System.Security.dll and System.Configuration.dll in monolite directory
[arm] Fix alignment problems when AOTing from osx to arm linux.
[aot] Use g_print instead of printf in one place since the former works on android.
[runtime] Add a workaround to file-mmap-posix.c to fix the android build.