b2 part of Boost release

[NeroBurner]

Is there documentation on how the changes in this repo b2 get into the Boost releases https://www.boost.org/users/download/

The current release tarballs of boost 1.75.0 and 1.76.0b1 both have a bootstrap.bat which has the call call .\build.bat instead of call .\build.bat %*

This change should be in b2 since 2010 65dfa39#diff-9f57a0ddd5f7432cbcbf6ab392a8ba9dcd6b71d95be6685e9ef2566a5c6bfc82 but it unfortunately is not.

[grafikrobot]

There isn't documentation yet on this. The basic goal was to mirror releases of B2 into the boostorg develop branch, and then to the master branch. My original plan was to use the cross-fork tracking to do most of this. But the boostorg setup for the build repo changed at some point after I first asked Github support to switch the base repo. As the boostorg repo was a fork of this one, but is no longer. So I will have to track it as vendor branch method of some sort.

[NeroBurner]

I found out, that the boostrap.bat in the root of the boost repo is a different one to the b2 one in the build subdirectory. The b2 bootstrap.bat is not used, and the one at the root misses the argument passing. Created a PR to fix that

boostorg/boost#498