This commit introduces a Darwin-specific template for NFS exports. This is almost identical to the standard BSD template except it puts each NFS export on its own line.
This resolves NFS issues discovered in macOS Catalina.
For bsd the resolve_host_path capability is a no-op. For darwin
hosts, if firmlinks are defined on the system, paths will be properly
resolved to real path.
Jeff Bonhag
Chris Roberts
Mitchell Hashimoto