Prior to this commit, if you set up multiple folders to export with NFS
on linux with the exact same hostpath, the template used to write
/etc/exports would end up placing the same path with the same IP in
/etc/exports and cause an error preventing the folders from being
properly mounted. This commit fixes that by first looking at which
folders are being exported and if there are any duplicates. If so,
remove the duplicates and only export 1 hostpath folder. If these
duplicate folders have differing nfs linux options, an exception must be
thrown because we cannot assume which options the user intended to
export with.
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.