* Mono.Unix/FileAccessPermissions.cs: Remove UserMask, GroupMask, OtherMask values.

	* Mono.Unix/FileAccessPermissions.cs: Remove UserMask, GroupMask, OtherMask values.
	* Mono.Unix/FileSpecialAttributes.cs: Remove AllAttributes member; it shouldn't be
	  public.  Use UnixFileSystemInfo.AllSpecialAttributes instead.
	* Mono.Unix/StdioFileStream.cs: Open files in binary mode, not text;
	  Fix exception message for StdioFileStream(path, mode) mode param check.
	* Mono.Unix/UnixDirectoryInfo.cs: Add Create(FileAccessPermissions) overload; change
	  GetFileSystemEntries() to include the directory name that the files came
	  from (otherwise they're in the current working direcetory, which they
	  probably aren't).
	* Mono.Unix/UnixFileInfo.cs: Add Create(FileAccessPermissions) overload; Add better
	  argument checking to several Open() overloads.
	* Mono.Unix/UnixFileSystemInfo.cs: Add AllSpecialAttributes, AllFileTypes members;
	  FullPath member should invalidate instance if path changes; Change return
	  type of GetFileStatus for maintenance/better documentation; ToStat()
	  should ensure that the instance is valid first.
	* Mono.Unix/UnixMarshal.cs: Add additional Errno values to CreateExceptionForError();
	  reformat CreateExceptionForError for maintenance.
	* Mono.Unix/UnixPath.cs: Obsolete InvalidPathChars -- FxCop never liked it, and now I
	  know why it didn't like it (thank you Framework Design Guidelines!).
	* Mono.Unix/UnixStream.cs: Use UnixFileSystemInfo.AllSpecialAttributes, not
	  FileSpecialAttributes.AllAttributes (which was removed).
	* Mono.Unix/UnixSymbolicLinkInfo.cs: Change return type of GetFileStatus().

	* Mono.Unix.Native/Stdlib.cs: s/ACCES/ACCESS/g.  How'd I create a badly
	  named errno value?

svn path=/trunk/mcs/; revision=54962