[overlay] remove unused MSM approach
This drops the reported MSM dependancy
[buffer][test] visit collection twice for mapping
[buffer] disable enlarged-cluster approach
temporary disabled with a define - if everything OK it will go completely
[buffer] remove unused segment-map
[buffer][test] optinally skip self-intersection check
[buffer][test] use other robust_point for counting dupplicate points
[buffer][fix] add required parameter for visit policy
[buffer] For clusters (occuption), avoid using turns as starting point
This enables the "get_occupation" again, but skips the get_left_turns function
[turns] remove is_discarded() function
Merge branch 'develop' of github.com:boostorg/geometry into develop