merge from trunk up to r6459

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6460 4407c894-4637-0410-b4f5-ada5f102cad1
Allow DFP printf, TODO, rework configure so awk is not needed

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6461 4407c894-4637-0410-b4f5-ada5f102cad1