Bitbucket -> Sourcehut

Update README

Update test case for reconfigure

Adapt v_reconfigure_channels to reality a little

No, that was a mistake. Caller can always choose not to reallocate - but can't choose to reallocate if we're refusing to do it

Don't reallocate when shrinking

Simplify mbarrier bits and ensure compatibility with newer macOS

Strive to avoid UB by using placement new to assert that storage does actually contain the correct POD object type

Fix for OSX memory barrier API deprecation

Proper symbol for MSVC

Include overriding Makefile.inc-bq if present

More principled approach to use of _aligned_malloc

Correct MSVC symbol

Update for clang

Minor build tweak

Doc tweaks

Minor reordering

Old version of valgrind on Travis doesn't support this flag

Minor tidy

README tweaks, copyright dates