* [vcpkg ci:osx] Remove brew install

* add instructions for creating a new vagrant box

* fix the vagrant scripts for the new box

* finish fixing the setup

* [mecab jxrlib] fix ports for CI

mecab needed to use an actual ref that wasn't master,
and jxrlib needed a patch for xcode 12 CLTs.

Additionally, this fixes the mecab version to be a date, the date of the last commit,
since `1.0` is not the correct version (mecab doesn't have released versions)

* [many ports] fix compile with Xcode 12 CLTs

This mostly means fixing errors on implicit-function-declaration,
and removing some Werrors
* alac-decoder
* apr
* argtable2
* arrow
* hyperscan
* mcpp
* minizip
* mosquitto
* stormlib

* [many ports] even more Xcode 12 CLT fixes

* [jxrlib darknet] fix the last ports! (hopefully)

* CRs, plus minor wip changes to osx scripts

* [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