fixing some small dspam oddities

roles/mailserver/files/etc_dspam_default.prefs

 statisticalSedation=5
 
 # Signature Location: message, headers, attachment
-signatureLocation=headers  # { message | headers } -> default:message
+signatureLocation=headers
 
 # Whitelist Threshold: the minimum number of innocent hits from a recipient to
 # be automatically whitelisted. Do not set this value too low!

roles/mailserver/files/etc_dspam_dspam.conf

 #
 # DSPAM Home: Specifies the base directory to be used for DSPAM storage
 #
-Home /var/spool/dspam
+Home /decrypted-mail/dspam
 
 #
 # StorageDriver: Specifies the storage driver backend (library) to use.