Fix bug #11298 - in XElement.Replace*(), create snapshot of content first before removal (unlike it is documented!)
Always release DeflateStream unmanaged resources. Fixes #13742
Enable System.DirectoryServices.Protocols assembly
Merge pull request #728 from alesliehughes/master

Enable System.DirectoryServices.Protocols assembly
Basic optional parameters support in binder. Fixes #13817
Fix bug #13716 - use XmlSchemaSettings.XmlResolver to resolve schemas.
Build Ix assemblies from rx sources.
generate mobile csproj files too.
[mdoc-validate] Allow <format/> to have ANY content.

The intent of the <format/> element is to assist encapsulating
arbitrary HTML content within an mdoc(5) container. This frequently
requires having more than _one_ element within the <format/> block.

(WTF was I thinking forgetting the maxOccurs attribute?!)
Make the gc descriptor tests fail consistently if python is not found.
Fix monodis compilation on mingw which is missing some fp classification functions.
Fix mingw compilation problems.
Remove the usage of gcc-3 on mingw, the gcc-3 package no longer exists on cygwin. Mono can be built by configuring with --host=i686-pc-mingw32. Building without this will not work, since the libtool wrapper executables created by libtool will be unusable, i.e. they exit before the real runtime process exits.