Add error handling to calls of mono_reflection_create_custom_attr_data_args (). Fixes part of #13435.
[sdb] Fix round tripping of vtypes with boxed fields. Fixes #12354.
Fix Syscall.readlink() for non-ascii targets

Syscall.readlink() currently returns an integer indicating the number of
bytes in the link. As buf contains chars, this value is useless if the
target contains non-ascii characters.

This commit creates a new overload which uses a byte array instead of a
StringBuilder and rewrites the old overload to return the number of chars
instead.

Fixes #11778 and #9611
Merge pull request #716 from alesliehughes/master

More System.DirectoryServices.ActiveDirectory classes
Merge pull request #701 from steffen-kiess/fix-11778

Fix Syscall.readlink() for non-ascii targets
Fix overflow checking in newarray with 64 bit array lengths. Fixes part of #13544.
Fix a missing return statement in 16d2bcaa379be0c38f84492a5528c5ab6dcd7e7d.
Add missed file AttributeMetadataCollection.cs
Windows Console Driver can handle redirected stdin/stdout
Add enum SchemaClassType
Add missed file TrustType.cs
Add class DnsPermission
Add enum ActiveDirectorySiteOptions
Add enum ActiveDirectorySyntax
Add enum ForestTrustDomainStatus
Add enum PropertyTypes
Add enum TopLevelNameStatus
Add class ActiveDirectoryOperationException
Add class ActiveDirectoryPartition
Add class ActiveDirectoryReplicationMetadata