Merge pull request #696 from gamechanger/as-log-etc-exports

log the expected `/etc/exports` config

dusty/systems/nfs/server.py

@@ -68,6 +68,11 @@ def _get_exports_for_repos(repos):
 
 def _write_exports_config(exports_set):
     exports_config = ''.join(exports_set)
+    log_to_client("Your /etc/exports file is missing a configuration that dusty expects, so we will try and update the file to look like this:")
+    log_to_client("------------")
+    log_to_client(exports_config)
+    log_to_client("------------")
+    log_to_client("If the write fails, you might try manually updating your /etc/exports file to include the above lines.")
     current_config = _read_exports_contents()
     current_config = config_file.remove_current_dusty_config(current_config)
     current_config += config_file.create_config_section(exports_config)