• utils: ignore ENOTSUP when chmod a symlink. It fixes a problem on Linux 6.6 that always refuses chmod on a symlink.
• build: fix build on CentOS 7
• linux: add new fallback when mount fails with EBUSY, so that there is not an additional tmpfs mount if not needed.
• utils: improve error message when a directory cannot be created as a component of the path is already existing as a non directory.