using scan-line polygon conversion for constructing wxregion

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74049 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
adding x server license terms for polygon methods

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74050 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
adding x server license terms for polygon methods

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74051 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
adding x server license terms for polygon methods

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74052 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775