* [boost] Update to 1.70.0

* [boost-build] Update to 1.70.0

* [folly][freeopcua][libtorrent][websocketpp] Upgrades/patches to handle boost 1.70

* [boost-variant] Revert to 1.69 due to regression
[fizz][folly] Update and fix for boost 1.70
[libsodium] Use CMake buildsystem replacement to enable non-Windows

* [wangle] Update. [folly] Avoid linking debug libs in release.

* [pcl] Fix compatibility with boost 1.70

* [fizz] Handle merge regression

* [arrow] Modernize and fix cmake targets

* [boost-type-traits] Update patches for arm64-windows

* [boost-locale] Add boost-system and boost-thread as arm64 dependencies

* [ompl] Add missing boost-timer dependency

* [various ports] remove references to CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS

* [alac,benchmark,capnproto] Fix  check_linkage call

* [fastlz] Fix SHA512

* [coroutine] Fix dynamic build

* [folly] Find double-conversion

* [gamma] Use vcpkg_from_github

* [librsync] Enable static builds

* [netcdf-cxx4] Fix SHA512

* [octomap] Fix static build

* [tidy-html5] Fix static build

* [various ports] remove custom messages for shared/static builds, modernize some scripts in the meantime

* [folly] Use ras0219's fix for link paths

* [octomap] Fix exported targets

* [uvatlas] Set tool download SHA512

* [duktape+python2] fix portfile to call configure with correct python version, manage python2 also outside win32

* [suitesparse] osx fix

* [gtkmm] Call vcpkg_check_linkage after including vcpkg functions

* [duktape] Resolve conflicts

* [duktape] FIxed typo in Python paths

* [wangle] Find zlib

* [openssl-uwp] Fix SHA512

* [glib] Allow static builds on non-Windows

* [suitesparse] Fix build on Windows

* [multiple ports] Bump CONTROL version

* [multiple ports] Fix description indent

* [directxtk] Fix CONTROL file

* [bde,duktape,qpid-proton] Build packages with python2 installed

* [binn] remove CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS

* [gdal,live555,uriparser] Fix regressions

* [live555] Update to 2019.04.24

* wangle init

* [wangle] Simplification

* [wangle] Fix finding gflags