lprint: rfc2483: Escape sparingly

Do not escape all of the printed properties. Escape only the properties
that have not been commented out in the output.

For example, the playlist properties should not be escaped if they will
be commented out in the output. This is unnecessary and makes the
printed output less human-readable.

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>