* [boost-locale] Use CMAKE_SYSTEM_NAME as a fallback where VCPKG_TARGET_IS_WINDOWS is not available

* fix this issue in a different way

* Remove comments in b2-options.cmake.in

Co-authored-by: nicole mazzuca <mazzucan@outlook.com>

* fix generate-ports.ps1

Co-authored-by: Nicole Mazzuca <mazzucan@outlook.com>

* [boost] update to 1.73

* [ompl] remove dependency to boost-disjoint-sets

* [libtorrent] include fixes from RC_1_2 branch

* [liblas] fix boost headers

* [freeopcua] fix std headers

* [pcl] fix build with Boost 1.73.0

* [hpx] fix build with Boost 1.73.0

* [libmysql] fix conflict with C++20 header <version>

* [boost-modular-build-helper] move port-specific b2 options to the file `<port_dir>/b2-options.cmake`
[boost-python] support Python2 (fixes #3495)

* [boost-python] remove Python executable from user-config

* [libtorrent] update version after merge

* [libtorrent] add boost-variant dependency