Change sample yapfaq.cfg (mark optional settings).

Optional settings are mostly commented out.

Signed-off-by: Thomas Hochstein <thh@inter.net>

yapfaq.cfg

@@ -11,7 +11,8 @@ Posting-frequency = '1d'
 
 # time period after which the posting should expire
 # use (d)ay OR (w)eek OR (m)onth OR (y)ear
-Expires = '3m'
+# This setting is optional. Default: 3m
+# Expires = '3m'
 
 # header "From:"
 From = 'test@domain.invalid'
@@ -26,16 +27,20 @@ Subject = 'test noreply ignore'
 NGs = 'de.test'
 
 # header "Followup-To:"
-Fup2 = 'poster'
+# This setting is optional. Default: unset
+# Fup2 = 'poster'
 
 # Message-ID ("%n" is $Name)
-MID-Format = '<%n-%d.%m.%y@domain.invalid>'
+# This setting is optional. Default: <%n-%d.%m.%y@YOURHOST>
+# MID-Format = '<%n-%d.%m.%y@domain.invalid>'
 
 # Supersede last posting?
+# This setting is optional. Default: unset
 Supersede = yes
 
 # extra headers (appended verbatim)
 # use this for custom headers like "Approved:"
+# This setting is optional. Default: unset
 ExtraHeader = 'Approved: moderator@domain.invalid
 X-Header: Some text'