patch [#34103] path_util_cleanup_path.patch
from Lawrence D'Oliveiro

Improve implementation of BLI_cleanup_path, including making it behave as documented.

"/../home/me" would become "home/me" rather then "/home/me"

Also remove redundant BLI_strncpy()


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@55147 954f8c5b-7b00-dc11-b283-0030488c597c