The pkcs12 file made with concat can be invalid due to missing line breaks

[davidc0le]

When creating a ds389 instance with an existing private key and certificates that I passed in via eyaml, I found the resulting concat output file was invalid because line breaks between the elements were missing.

[spacepants]

It's been a while since I worked with it, but we also used eyaml for secrets management. IIRC, I think we were able to accomplish this by using block literals which preserve newlines.