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.
Changes introduced in 982af05 caused the RDP configuration file to be written
with all settings on one line instead of one setting per line. The Microsoft
Remote Desktop client for OS X rejects these configuration files as being
malformed. This patch restores the configuration to one line per setting and
adds tests to guard against regression.
Jeff Bonhag
Chris Roberts
Charlie Sharpsteen
Seth Vargo