## Summary of Changes
Fixes warnings/errors. Quite a few are just cherry picking fixes that
were done in master.
## Release Management
* Affected package(s): Various
* Issue(s) solved (if any): -
* Feature/Small Feature (if any): -
* License and copyright ownership: no change
That will suppress the warnings about `CMP0167` (from CMake 3.30):
```
CMake Warning (dev) at cmake/modules/display-third-party-libs-versions.cmake:37 (find_package):
Policy CMP0167 is not set: The FindBoost module is removed. Run "cmake
--help-policy CMP0167" for policy details. Use the cmake_policy command to
set the policy and suppress this warning.
```
Spelling correction
Note: we also have a similar spelling error in:
```
Surface_mesh_skeletonization/benchmark/Surface_mesh_skeletonization/mcf_scale_invariance.cpp:104: output.open("correspondance.cgal");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/MCF_Skeleton_example.cpp:68: output.open("correspondance-poly.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/MCF_Skeleton_LCC_example.cpp:66: output.open("correspondance-lcc.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/MCF_Skeleton_om_example.cpp:75: output.open("correspondance-sm.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/MCF_Skeleton_sm_example.cpp:67: output.open("correspondance-sm.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/simple_mcfskel_example.cpp:72: output.open("correspondance-poly.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/simple_mcfskel_LCC_example.cpp:72: output.open("correspondance-lcc.polylines.txt");
Surface_mesh_skeletonization/examples/Surface_mesh_skeletonization/simple_mcfskel_sm_example.cpp:51: output.open("correspondance-sm.polylines.txt");
```
but as this in filenames I didn't change it.
if a needle is also a cap, it will be handled as a needle only. But if
we can't collapse the edge, a flip will not be tried. Try the flip too.
Note that this will slow down the method as the status of a triangle is
tested twice.
Fix#8605