b84fad2ba3
Need to use the 'use_partial_connect' option in island connect, so changed signatures of various functions to pass that into and then down from BM_mesh_intersect (making true for intersect, false for boolean). Then fix bm_face_split_edgenet_partial_connect to work when input edges are not necessarily wire, but at least not in the face they are being connected in. That caused generalization of core BM_vert_separate_hflag_wire (which is only used in this one place in all Blender).